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Finding the Fourth Proportional to 78,480.42, 108,306.68 and 44,489.57

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Solution

The fourth proportional to 78,480.42, 108,306.68 and 44,489.57 is: 61,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,480.42 : 108,306.68 = 44,489.57 : x
  2. Step 2: Convert to fraction form
    78,480.42/108,306.68 = 44,489.57/x
  3. Step 3: Cross multiply
    78,480.42x = 108,306.68 × 44,489.57
  4. Step 4: Simplify right side
    78,480.42x = 4,818,517,621.33
  5. Step 5: Solve for x
    x = 4,818,517,621.33/78,480.42
  6. Step 6: Final answer
    x = 61,397.70

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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.