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Finding the Fourth Proportional to 123,560.52, 170,513.66 and 66,971.89

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Solution

The fourth proportional to 123,560.52, 170,513.66 and 66,971.89 is: 92,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,560.52 : 170,513.66 = 66,971.89 : x
  2. Step 2: Convert to fraction form
    123,560.52/170,513.66 = 66,971.89/x
  3. Step 3: Cross multiply
    123,560.52x = 170,513.66 × 66,971.89
  4. Step 4: Simplify right side
    123,560.52x = 11,419,622,081.02
  5. Step 5: Solve for x
    x = 11,419,622,081.02/123,560.52
  6. Step 6: Final answer
    x = 92,421.29

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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.