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Finding the Fourth Proportional to 71,789.60, 99,057.84 and 39,957.68

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Solution

The fourth proportional to 71,789.60, 99,057.84 and 39,957.68 is: 55,135.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,789.60 : 99,057.84 = 39,957.68 : x
  2. Step 2: Convert to fraction form
    71,789.60/99,057.84 = 39,957.68/x
  3. Step 3: Cross multiply
    71,789.60x = 99,057.84 × 39,957.68
  4. Step 4: Simplify right side
    71,789.60x = 3,958,121,472.21
  5. Step 5: Solve for x
    x = 3,958,121,472.21/71,789.60
  6. Step 6: Final answer
    x = 55,135.03

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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.