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Finding the Fourth Proportional to 129,047.46, 178,104.87 and 92,868.68

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Solution

The fourth proportional to 129,047.46, 178,104.87 and 92,868.68 is: 128,172.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,047.46 : 178,104.87 = 92,868.68 : x
  2. Step 2: Convert to fraction form
    129,047.46/178,104.87 = 92,868.68/x
  3. Step 3: Cross multiply
    129,047.46x = 178,104.87 × 92,868.68
  4. Step 4: Simplify right side
    129,047.46x = 16,540,363,287.95
  5. Step 5: Solve for x
    x = 16,540,363,287.95/129,047.46
  6. Step 6: Final answer
    x = 128,172.71

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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.