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Finding the Fourth Proportional to 83,272.86, 124,801.95 and 72,555.78

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Solution

The fourth proportional to 83,272.86, 124,801.95 and 72,555.78 is: 108,740.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,272.86 : 124,801.95 = 72,555.78 : x
  2. Step 2: Convert to fraction form
    83,272.86/124,801.95 = 72,555.78/x
  3. Step 3: Cross multiply
    83,272.86x = 124,801.95 × 72,555.78
  4. Step 4: Simplify right side
    83,272.86x = 9,055,102,827.77
  5. Step 5: Solve for x
    x = 9,055,102,827.77/83,272.86
  6. Step 6: Final answer
    x = 108,740.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.