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Finding the Fourth Proportional to 207,248.46, 311,036.70 and 80,949.20

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Solution

The fourth proportional to 207,248.46, 311,036.70 and 80,949.20 is: 121,487.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,248.46 : 311,036.70 = 80,949.20 : x
  2. Step 2: Convert to fraction form
    207,248.46/311,036.70 = 80,949.20/x
  3. Step 3: Cross multiply
    207,248.46x = 311,036.70 × 80,949.20
  4. Step 4: Simplify right side
    207,248.46x = 25,178,172,035.64
  5. Step 5: Solve for x
    x = 25,178,172,035.64/207,248.46
  6. Step 6: Final answer
    x = 121,487.86

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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.