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Finding the Fourth Proportional to 138,877.52, 191,617.80 and 82,279.04

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Solution

The fourth proportional to 138,877.52, 191,617.80 and 82,279.04 is: 113,525.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,877.52 : 191,617.80 = 82,279.04 : x
  2. Step 2: Convert to fraction form
    138,877.52/191,617.80 = 82,279.04/x
  3. Step 3: Cross multiply
    138,877.52x = 191,617.80 × 82,279.04
  4. Step 4: Simplify right side
    138,877.52x = 15,766,128,630.91
  5. Step 5: Solve for x
    x = 15,766,128,630.91/138,877.52
  6. Step 6: Final answer
    x = 113,525.42

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1.5x scale

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.