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Finding the Fourth Proportional to 93,419.10, 140,128.65 and 85,545.90

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Solution

The fourth proportional to 93,419.10, 140,128.65 and 85,545.90 is: 128,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,419.10 : 140,128.65 = 85,545.90 : x
  2. Step 2: Convert to fraction form
    93,419.10/140,128.65 = 85,545.90/x
  3. Step 3: Cross multiply
    93,419.10x = 140,128.65 × 85,545.90
  4. Step 4: Simplify right side
    93,419.10x = 11,987,431,480.04
  5. Step 5: Solve for x
    x = 11,987,431,480.04/93,419.10
  6. Step 6: Final answer
    x = 128,318.85

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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.