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Finding the Fourth Proportional to 71,718.80, 107,633.88 and 49,686.56

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Solution

The fourth proportional to 71,718.80, 107,633.88 and 49,686.56 is: 74,568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,718.80 : 107,633.88 = 49,686.56 : x
  2. Step 2: Convert to fraction form
    71,718.80/107,633.88 = 49,686.56/x
  3. Step 3: Cross multiply
    71,718.80x = 107,633.88 × 49,686.56
  4. Step 4: Simplify right side
    71,718.80x = 5,347,957,236.65
  5. Step 5: Solve for x
    x = 5,347,957,236.65/71,718.80
  6. Step 6: Final answer
    x = 74,568.41

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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.