Home / 129,234.75-178,342.20-72,646.26

Finding the Fourth Proportional to 129,234.75, 178,342.20 and 72,646.26

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Solution

The fourth proportional to 129,234.75, 178,342.20 and 72,646.26 is: 100,250.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,234.75 : 178,342.20 = 72,646.26 : x
  2. Step 2: Convert to fraction form
    129,234.75/178,342.20 = 72,646.26/x
  3. Step 3: Cross multiply
    129,234.75x = 178,342.20 × 72,646.26
  4. Step 4: Simplify right side
    129,234.75x = 12,955,893,830.17
  5. Step 5: Solve for x
    x = 12,955,893,830.17/129,234.75
  6. Step 6: Final answer
    x = 100,250.85

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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.