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Finding the Fourth Proportional to 129,250.87, 178,278.53 and 83,847.71

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Solution

The fourth proportional to 129,250.87, 178,278.53 and 83,847.71 is: 115,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,250.87 : 178,278.53 = 83,847.71 : x
  2. Step 2: Convert to fraction form
    129,250.87/178,278.53 = 83,847.71/x
  3. Step 3: Cross multiply
    129,250.87x = 178,278.53 × 83,847.71
  4. Step 4: Simplify right side
    129,250.87x = 14,948,246,482.67
  5. Step 5: Solve for x
    x = 14,948,246,482.67/129,250.87
  6. Step 6: Final answer
    x = 115,652.97

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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.