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Finding the Fourth Proportional to 138,248.61, 207,372.79 and 79,042.74

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Solution

The fourth proportional to 138,248.61, 207,372.79 and 79,042.74 is: 118,564.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,248.61 : 207,372.79 = 79,042.74 : x
  2. Step 2: Convert to fraction form
    138,248.61/207,372.79 = 79,042.74/x
  3. Step 3: Cross multiply
    138,248.61x = 207,372.79 × 79,042.74
  4. Step 4: Simplify right side
    138,248.61x = 16,391,312,844.20
  5. Step 5: Solve for x
    x = 16,391,312,844.20/138,248.61
  6. Step 6: Final answer
    x = 118,564.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.