Home / 90,009,371.40-135,014,057.10-86,230,235.40

Finding the Fourth Proportional to 90,009,371.40, 135,014,057.10 and 86,230,235.40

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Solution

The fourth proportional to 90,009,371.40, 135,014,057.10 and 86,230,235.40 is: 129,345,353.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,009,371.40 : 135,014,057.10 = 86,230,235.40 : x
  2. Step 2: Convert to fraction form
    90,009,371.40/135,014,057.10 = 86,230,235.40/x
  3. Step 3: Cross multiply
    90,009,371.40x = 135,014,057.10 × 86,230,235.40
  4. Step 4: Simplify right side
    90,009,371.40x = 11,642,293,926,042,042
  5. Step 5: Solve for x
    x = 11,642,293,926,042,042/90,009,371.40
  6. Step 6: Final answer
    x = 129,345,353.10

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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.