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Finding the Fourth Proportional to 71,992.12, 99,348.40 and 39,727

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Solution

The fourth proportional to 71,992.12, 99,348.40 and 39,727 is: 54,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,992.12 : 99,348.40 = 39,727 : x
  2. Step 2: Convert to fraction form
    71,992.12/99,348.40 = 39,727/x
  3. Step 3: Cross multiply
    71,992.12x = 99,348.40 × 39,727
  4. Step 4: Simplify right side
    71,992.12x = 3,946,813,886.80
  5. Step 5: Solve for x
    x = 3,946,813,886.80/71,992.12
  6. Step 6: Final answer
    x = 54,822.86

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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.