Home / 129,245.64-178,375.06-72,657.06

Finding the Fourth Proportional to 129,245.64, 178,375.06 and 72,657.06

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Solution

The fourth proportional to 129,245.64, 178,375.06 and 72,657.06 is: 100,275.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,245.64 : 178,375.06 = 72,657.06 : x
  2. Step 2: Convert to fraction form
    129,245.64/178,375.06 = 72,657.06/x
  3. Step 3: Cross multiply
    129,245.64x = 178,375.06 × 72,657.06
  4. Step 4: Simplify right side
    129,245.64x = 12,960,207,436.92
  5. Step 5: Solve for x
    x = 12,960,207,436.92/129,245.64
  6. Step 6: Final answer
    x = 100,275.78

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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.