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Finding the Fourth Proportional to 126,137.79, 174,062.52 and 72,417.78

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Solution

The fourth proportional to 126,137.79, 174,062.52 and 72,417.78 is: 99,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,137.79 : 174,062.52 = 72,417.78 : x
  2. Step 2: Convert to fraction form
    126,137.79/174,062.52 = 72,417.78/x
  3. Step 3: Cross multiply
    126,137.79x = 174,062.52 × 72,417.78
  4. Step 4: Simplify right side
    126,137.79x = 12,605,221,279.61
  5. Step 5: Solve for x
    x = 12,605,221,279.61/126,137.79
  6. Step 6: Final answer
    x = 99,932.16

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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.