Home / 129,602.88-178,853.96-72,240.61

Finding the Fourth Proportional to 129,602.88, 178,853.96 and 72,240.61

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Solution

The fourth proportional to 129,602.88, 178,853.96 and 72,240.61 is: 99,693.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,602.88 : 178,853.96 = 72,240.61 : x
  2. Step 2: Convert to fraction form
    129,602.88/178,853.96 = 72,240.61/x
  3. Step 3: Cross multiply
    129,602.88x = 178,853.96 × 72,240.61
  4. Step 4: Simplify right side
    129,602.88x = 12,920,517,915.84
  5. Step 5: Solve for x
    x = 12,920,517,915.84/129,602.88
  6. Step 6: Final answer
    x = 99,693.14

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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.