Home / 129,586.22-178,830.78-72,223.95

Finding the Fourth Proportional to 129,586.22, 178,830.78 and 72,223.95

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Solution

The fourth proportional to 129,586.22, 178,830.78 and 72,223.95 is: 99,670.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.22 : 178,830.78 = 72,223.95 : x
  2. Step 2: Convert to fraction form
    129,586.22/178,830.78 = 72,223.95/x
  3. Step 3: Cross multiply
    129,586.22x = 178,830.78 × 72,223.95
  4. Step 4: Simplify right side
    129,586.22x = 12,915,864,371.73
  5. Step 5: Solve for x
    x = 12,915,864,371.73/129,586.22
  6. Step 6: Final answer
    x = 99,670.04

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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.