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Finding the Fourth Proportional to 121,781.26, 182,671.92 and 79,696.78

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Solution

The fourth proportional to 121,781.26, 182,671.92 and 79,696.78 is: 119,545.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,781.26 : 182,671.92 = 79,696.78 : x
  2. Step 2: Convert to fraction form
    121,781.26/182,671.92 = 79,696.78/x
  3. Step 3: Cross multiply
    121,781.26x = 182,671.92 × 79,696.78
  4. Step 4: Simplify right side
    121,781.26x = 14,558,363,820.42
  5. Step 5: Solve for x
    x = 14,558,363,820.42/121,781.26
  6. Step 6: Final answer
    x = 119,545.19

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1.5x scale

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.