Home / 90,432,012.40-135,648,018.60-86,904,818.80

Finding the Fourth Proportional to 90,432,012.40, 135,648,018.60 and 86,904,818.80

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Solution

The fourth proportional to 90,432,012.40, 135,648,018.60 and 86,904,818.80 is: 130,357,228.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,432,012.40 : 135,648,018.60 = 86,904,818.80 : x
  2. Step 2: Convert to fraction form
    90,432,012.40/135,648,018.60 = 86,904,818.80/x
  3. Step 3: Cross multiply
    90,432,012.40x = 135,648,018.60 × 86,904,818.80
  4. Step 4: Simplify right side
    90,432,012.40x = 11,788,466,477,012,028
  5. Step 5: Solve for x
    x = 11,788,466,477,012,028/90,432,012.40
  6. Step 6: Final answer
    x = 130,357,228.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.