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Finding the Fourth Proportional to 100,872.20, 151,454.10 and 76,086.20

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Solution

The fourth proportional to 100,872.20, 151,454.10 and 76,086.20 is: 114,239.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,872.20 : 151,454.10 = 76,086.20 : x
  2. Step 2: Convert to fraction form
    100,872.20/151,454.10 = 76,086.20/x
  3. Step 3: Cross multiply
    100,872.20x = 151,454.10 × 76,086.20
  4. Step 4: Simplify right side
    100,872.20x = 11,523,566,943.42
  5. Step 5: Solve for x
    x = 11,523,566,943.42/100,872.20
  6. Step 6: Final answer
    x = 114,239.27

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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.