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Finding the Fourth Proportional to 146,711.20, 220,066.80 and 67,979.20

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Solution

The fourth proportional to 146,711.20, 220,066.80 and 67,979.20 is: 101,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,711.20 : 220,066.80 = 67,979.20 : x
  2. Step 2: Convert to fraction form
    146,711.20/220,066.80 = 67,979.20/x
  3. Step 3: Cross multiply
    146,711.20x = 220,066.80 × 67,979.20
  4. Step 4: Simplify right side
    146,711.20x = 14,959,965,010.56
  5. Step 5: Solve for x
    x = 14,959,965,010.56/146,711.20
  6. Step 6: Final answer
    x = 101,968.80

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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.