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Finding the Fourth Proportional to 123,122.87, 169,909.56 and 69,407.88

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Solution

The fourth proportional to 123,122.87, 169,909.56 and 69,407.88 is: 95,782.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,122.87 : 169,909.56 = 69,407.88 : x
  2. Step 2: Convert to fraction form
    123,122.87/169,909.56 = 69,407.88/x
  3. Step 3: Cross multiply
    123,122.87x = 169,909.56 × 69,407.88
  4. Step 4: Simplify right side
    123,122.87x = 11,793,062,749.29
  5. Step 5: Solve for x
    x = 11,793,062,749.29/123,122.87
  6. Step 6: Final answer
    x = 95,782.88

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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.