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Finding the Fourth Proportional to 80,562.72, 120,719.88 and 43,127.76

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Solution

The fourth proportional to 80,562.72, 120,719.88 and 43,127.76 is: 64,625.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,562.72 : 120,719.88 = 43,127.76 : x
  2. Step 2: Convert to fraction form
    80,562.72/120,719.88 = 43,127.76/x
  3. Step 3: Cross multiply
    80,562.72x = 120,719.88 × 43,127.76
  4. Step 4: Simplify right side
    80,562.72x = 5,206,378,011.87
  5. Step 5: Solve for x
    x = 5,206,378,011.87/80,562.72
  6. Step 6: Final answer
    x = 64,625.15

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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.