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Finding the Fourth Proportional to 92,514.90, 138,679.80 and 42,631.02

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Solution

The fourth proportional to 92,514.90, 138,679.80 and 42,631.02 is: 63,903.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,514.90 : 138,679.80 = 42,631.02 : x
  2. Step 2: Convert to fraction form
    92,514.90/138,679.80 = 42,631.02/x
  3. Step 3: Cross multiply
    92,514.90x = 138,679.80 × 42,631.02
  4. Step 4: Simplify right side
    92,514.90x = 5,912,061,327.40
  5. Step 5: Solve for x
    x = 5,912,061,327.40/92,514.90
  6. Step 6: Final answer
    x = 63,903.88

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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.