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Finding the Fourth Proportional to 71,691.90, 107,534.75 and 21,770.88

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Solution

The fourth proportional to 71,691.90, 107,534.75 and 21,770.88 is: 32,655.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,691.90 : 107,534.75 = 21,770.88 : x
  2. Step 2: Convert to fraction form
    71,691.90/107,534.75 = 21,770.88/x
  3. Step 3: Cross multiply
    71,691.90x = 107,534.75 × 21,770.88
  4. Step 4: Simplify right side
    71,691.90x = 2,341,126,029.23
  5. Step 5: Solve for x
    x = 2,341,126,029.23/71,691.90
  6. Step 6: Final answer
    x = 32,655.38

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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.