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Finding the Fourth Proportional to 187,311.20, 280,966.80 and 112,515.80

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Solution

The fourth proportional to 187,311.20, 280,966.80 and 112,515.80 is: 168,773.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,311.20 : 280,966.80 = 112,515.80 : x
  2. Step 2: Convert to fraction form
    187,311.20/280,966.80 = 112,515.80/x
  3. Step 3: Cross multiply
    187,311.20x = 280,966.80 × 112,515.80
  4. Step 4: Simplify right side
    187,311.20x = 31,613,204,275.44
  5. Step 5: Solve for x
    x = 31,613,204,275.44/187,311.20
  6. Step 6: Final answer
    x = 168,773.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.