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Finding the Fourth Proportional to 127,542.57, 175,935.47 and 79,712.88

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Solution

The fourth proportional to 127,542.57, 175,935.47 and 79,712.88 is: 109,957.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,542.57 : 175,935.47 = 79,712.88 : x
  2. Step 2: Convert to fraction form
    127,542.57/175,935.47 = 79,712.88/x
  3. Step 3: Cross multiply
    127,542.57x = 175,935.47 × 79,712.88
  4. Step 4: Simplify right side
    127,542.57x = 14,024,322,128.18
  5. Step 5: Solve for x
    x = 14,024,322,128.18/127,542.57
  6. Step 6: Final answer
    x = 109,957.97

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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.