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Finding the Fourth Proportional to 85,005.60, 127,508.40 and 75,820.20

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Solution

The fourth proportional to 85,005.60, 127,508.40 and 75,820.20 is: 113,730.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,005.60 : 127,508.40 = 75,820.20 : x
  2. Step 2: Convert to fraction form
    85,005.60/127,508.40 = 75,820.20/x
  3. Step 3: Cross multiply
    85,005.60x = 127,508.40 × 75,820.20
  4. Step 4: Simplify right side
    85,005.60x = 9,667,712,389.68
  5. Step 5: Solve for x
    x = 9,667,712,389.68/85,005.60
  6. Step 6: Final answer
    x = 113,730.30

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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.