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Finding the Fourth Proportional to 81,751.77, 112,818.18 and 49,487.13

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Solution

The fourth proportional to 81,751.77, 112,818.18 and 49,487.13 is: 68,292.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,751.77 : 112,818.18 = 49,487.13 : x
  2. Step 2: Convert to fraction form
    81,751.77/112,818.18 = 49,487.13/x
  3. Step 3: Cross multiply
    81,751.77x = 112,818.18 × 49,487.13
  4. Step 4: Simplify right side
    81,751.77x = 5,583,047,375.93
  5. Step 5: Solve for x
    x = 5,583,047,375.93/81,751.77
  6. Step 6: Final answer
    x = 68,292.68

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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.