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Finding the Fourth Proportional to 72,753.27, 100,411.88 and 53,731.86

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Solution

The fourth proportional to 72,753.27, 100,411.88 and 53,731.86 is: 74,159.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,753.27 : 100,411.88 = 53,731.86 : x
  2. Step 2: Convert to fraction form
    72,753.27/100,411.88 = 53,731.86/x
  3. Step 3: Cross multiply
    72,753.27x = 100,411.88 × 53,731.86
  4. Step 4: Simplify right side
    72,753.27x = 5,395,316,809.84
  5. Step 5: Solve for x
    x = 5,395,316,809.84/72,753.27
  6. Step 6: Final answer
    x = 74,159.10

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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.