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Finding the Fourth Proportional to 123,160.69, 169,961.61 and 66,572.11

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Solution

The fourth proportional to 123,160.69, 169,961.61 and 66,572.11 is: 91,869.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,160.69 : 169,961.61 = 66,572.11 : x
  2. Step 2: Convert to fraction form
    123,160.69/169,961.61 = 66,572.11/x
  3. Step 3: Cross multiply
    123,160.69x = 169,961.61 × 66,572.11
  4. Step 4: Simplify right side
    123,160.69x = 11,314,702,996.70
  5. Step 5: Solve for x
    x = 11,314,702,996.70/123,160.69
  6. Step 6: Final answer
    x = 91,869.43

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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.