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Finding the Fourth Proportional to 157,609.10, 217,500.25 and 85,989.17

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Solution

The fourth proportional to 157,609.10, 217,500.25 and 85,989.17 is: 118,664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,609.10 : 217,500.25 = 85,989.17 : x
  2. Step 2: Convert to fraction form
    157,609.10/217,500.25 = 85,989.17/x
  3. Step 3: Cross multiply
    157,609.10x = 217,500.25 × 85,989.17
  4. Step 4: Simplify right side
    157,609.10x = 18,702,665,972.29
  5. Step 5: Solve for x
    x = 18,702,665,972.29/157,609.10
  6. Step 6: Final answer
    x = 118,664.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.