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Finding the Fourth Proportional to 72,446.62, 99,981.13 and 40,617.58

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Solution

The fourth proportional to 72,446.62, 99,981.13 and 40,617.58 is: 56,054.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,446.62 : 99,981.13 = 40,617.58 : x
  2. Step 2: Convert to fraction form
    72,446.62/99,981.13 = 40,617.58/x
  3. Step 3: Cross multiply
    72,446.62x = 99,981.13 × 40,617.58
  4. Step 4: Simplify right side
    72,446.62x = 4,060,991,546.27
  5. Step 5: Solve for x
    x = 4,060,991,546.27/72,446.62
  6. Step 6: Final answer
    x = 56,054.95

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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.