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Finding the Fourth Proportional to 71,337.80, 107,006.70 and 66,672.20

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Solution

The fourth proportional to 71,337.80, 107,006.70 and 66,672.20 is: 100,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,337.80 : 107,006.70 = 66,672.20 : x
  2. Step 2: Convert to fraction form
    71,337.80/107,006.70 = 66,672.20/x
  3. Step 3: Cross multiply
    71,337.80x = 107,006.70 × 66,672.20
  4. Step 4: Simplify right side
    71,337.80x = 7,134,372,103.74
  5. Step 5: Solve for x
    x = 7,134,372,103.74/71,337.80
  6. Step 6: Final answer
    x = 100,008.30

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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.