Home / 129,560.68-178,781.32-72,197.56

Finding the Fourth Proportional to 129,560.68, 178,781.32 and 72,197.56

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Solution

The fourth proportional to 129,560.68, 178,781.32 and 72,197.56 is: 99,625.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,560.68 : 178,781.32 = 72,197.56 : x
  2. Step 2: Convert to fraction form
    129,560.68/178,781.32 = 72,197.56/x
  3. Step 3: Cross multiply
    129,560.68x = 178,781.32 × 72,197.56
  4. Step 4: Simplify right side
    129,560.68x = 12,907,575,077.58
  5. Step 5: Solve for x
    x = 12,907,575,077.58/129,560.68
  6. Step 6: Final answer
    x = 99,625.71

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1.5x scale

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.