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Finding the Fourth Proportional to 72,381.03, 99,884.66 and 40,549.71

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Solution

The fourth proportional to 72,381.03, 99,884.66 and 40,549.71 is: 55,957.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,381.03 : 99,884.66 = 40,549.71 : x
  2. Step 2: Convert to fraction form
    72,381.03/99,884.66 = 40,549.71/x
  3. Step 3: Cross multiply
    72,381.03x = 99,884.66 × 40,549.71
  4. Step 4: Simplify right side
    72,381.03x = 4,050,293,793.70
  5. Step 5: Solve for x
    x = 4,050,293,793.70/72,381.03
  6. Step 6: Final answer
    x = 55,957.95

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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.