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Finding the Fourth Proportional to 71,797.80, 99,080.16 and 39,531.76

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Solution

The fourth proportional to 71,797.80, 99,080.16 and 39,531.76 is: 54,553.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,797.80 : 99,080.16 = 39,531.76 : x
  2. Step 2: Convert to fraction form
    71,797.80/99,080.16 = 39,531.76/x
  3. Step 3: Cross multiply
    71,797.80x = 99,080.16 × 39,531.76
  4. Step 4: Simplify right side
    71,797.80x = 3,916,813,105.88
  5. Step 5: Solve for x
    x = 3,916,813,105.88/71,797.80
  6. Step 6: Final answer
    x = 54,553.39

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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.