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Finding the Fourth Proportional to 207,470.70, 311,133.15 and 74,355.30

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Solution

The fourth proportional to 207,470.70, 311,133.15 and 74,355.30 is: 111,506.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,470.70 : 311,133.15 = 74,355.30 : x
  2. Step 2: Convert to fraction form
    207,470.70/311,133.15 = 74,355.30/x
  3. Step 3: Cross multiply
    207,470.70x = 311,133.15 × 74,355.30
  4. Step 4: Simplify right side
    207,470.70x = 23,134,398,708.20
  5. Step 5: Solve for x
    x = 23,134,398,708.20/207,470.70
  6. Step 6: Final answer
    x = 111,506.82

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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.