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Finding the Fourth Proportional to 78,387.64, 108,177.69 and 44,397.10

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Solution

The fourth proportional to 78,387.64, 108,177.69 and 44,397.10 is: 61,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,387.64 : 108,177.69 = 44,397.10 : x
  2. Step 2: Convert to fraction form
    78,387.64/108,177.69 = 44,397.10/x
  3. Step 3: Cross multiply
    78,387.64x = 108,177.69 × 44,397.10
  4. Step 4: Simplify right side
    78,387.64x = 4,802,775,720.70
  5. Step 5: Solve for x
    x = 4,802,775,720.70/78,387.64
  6. Step 6: Final answer
    x = 61,269.55

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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.