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Finding the Fourth Proportional to 123,159.72, 169,964.60 and 71,472.81

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Solution

The fourth proportional to 123,159.72, 169,964.60 and 71,472.81 is: 98,634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,159.72 : 169,964.60 = 71,472.81 : x
  2. Step 2: Convert to fraction form
    123,159.72/169,964.60 = 71,472.81/x
  3. Step 3: Cross multiply
    123,159.72x = 169,964.60 × 71,472.81
  4. Step 4: Simplify right side
    123,159.72x = 12,147,848,217.11
  5. Step 5: Solve for x
    x = 12,147,848,217.11/123,159.72
  6. Step 6: Final answer
    x = 98,634.92

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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.