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Finding the Fourth Proportional to 71,757.80, 99,061.64 and 55,589.12

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Solution

The fourth proportional to 71,757.80, 99,061.64 and 55,589.12 is: 76,740.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,757.80 : 99,061.64 = 55,589.12 : x
  2. Step 2: Convert to fraction form
    71,757.80/99,061.64 = 55,589.12/x
  3. Step 3: Cross multiply
    71,757.80x = 99,061.64 × 55,589.12
  4. Step 4: Simplify right side
    71,757.80x = 5,506,749,393.36
  5. Step 5: Solve for x
    x = 5,506,749,393.36/71,757.80
  6. Step 6: Final answer
    x = 76,740.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.