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Finding the Fourth Proportional to 80,575.80, 120,863.70 and 71,590.20

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Solution

The fourth proportional to 80,575.80, 120,863.70 and 71,590.20 is: 107,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,575.80 : 120,863.70 = 71,590.20 : x
  2. Step 2: Convert to fraction form
    80,575.80/120,863.70 = 71,590.20/x
  3. Step 3: Cross multiply
    80,575.80x = 120,863.70 × 71,590.20
  4. Step 4: Simplify right side
    80,575.80x = 8,652,656,455.74
  5. Step 5: Solve for x
    x = 8,652,656,455.74/80,575.80
  6. Step 6: Final answer
    x = 107,385.30

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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.