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Finding the Fourth Proportional to 72,812.27, 100,480.71 and 40,981.16

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Solution

The fourth proportional to 72,812.27, 100,480.71 and 40,981.16 is: 56,553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.27 : 100,480.71 = 40,981.16 : x
  2. Step 2: Convert to fraction form
    72,812.27/100,480.71 = 40,981.16/x
  3. Step 3: Cross multiply
    72,812.27x = 100,480.71 × 40,981.16
  4. Step 4: Simplify right side
    72,812.27x = 4,117,816,053.42
  5. Step 5: Solve for x
    x = 4,117,816,053.42/72,812.27
  6. Step 6: Final answer
    x = 56,553.88

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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.