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Finding the Fourth Proportional to 123,153.43, 169,951.66 and 66,564.81

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Solution

The fourth proportional to 123,153.43, 169,951.66 and 66,564.81 is: 91,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,153.43 : 169,951.66 = 66,564.81 : x
  2. Step 2: Convert to fraction form
    123,153.43/169,951.66 = 66,564.81/x
  3. Step 3: Cross multiply
    123,153.43x = 169,951.66 × 66,564.81
  4. Step 4: Simplify right side
    123,153.43x = 11,312,799,957.08
  5. Step 5: Solve for x
    x = 11,312,799,957.08/123,153.43
  6. Step 6: Final answer
    x = 91,859.40

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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.