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Finding the Fourth Proportional to 71,808.03, 99,098.55 and 39,976.92

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Solution

The fourth proportional to 71,808.03, 99,098.55 and 39,976.92 is: 55,170.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.03 : 99,098.55 = 39,976.92 : x
  2. Step 2: Convert to fraction form
    71,808.03/99,098.55 = 39,976.92/x
  3. Step 3: Cross multiply
    71,808.03x = 99,098.55 × 39,976.92
  4. Step 4: Simplify right side
    71,808.03x = 3,961,654,805.47
  5. Step 5: Solve for x
    x = 3,961,654,805.47/71,808.03
  6. Step 6: Final answer
    x = 55,170.08

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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.