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Finding the Fourth Proportional to 187,000.40, 280,414.20 and 81,765.20

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Solution

The fourth proportional to 187,000.40, 280,414.20 and 81,765.20 is: 122,610.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,000.40 : 280,414.20 = 81,765.20 : x
  2. Step 2: Convert to fraction form
    187,000.40/280,414.20 = 81,765.20/x
  3. Step 3: Cross multiply
    187,000.40x = 280,414.20 × 81,765.20
  4. Step 4: Simplify right side
    187,000.40x = 22,928,123,145.84
  5. Step 5: Solve for x
    x = 22,928,123,145.84/187,000.40
  6. Step 6: Final answer
    x = 122,610.02

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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.