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Finding the Fourth Proportional to 89,661.86, 123,734.19 and 49,375.79

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Solution

The fourth proportional to 89,661.86, 123,734.19 and 49,375.79 is: 68,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,661.86 : 123,734.19 = 49,375.79 : x
  2. Step 2: Convert to fraction form
    89,661.86/123,734.19 = 49,375.79/x
  3. Step 3: Cross multiply
    89,661.86x = 123,734.19 × 49,375.79
  4. Step 4: Simplify right side
    89,661.86x = 6,109,473,381.26
  5. Step 5: Solve for x
    x = 6,109,473,381.26/89,661.86
  6. Step 6: Final answer
    x = 68,139.04

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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.