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Finding the Fourth Proportional to 218,616.52, 327,970.88 and 70,861

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Solution

The fourth proportional to 218,616.52, 327,970.88 and 70,861 is: 106,306.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,616.52 : 327,970.88 = 70,861 : x
  2. Step 2: Convert to fraction form
    218,616.52/327,970.88 = 70,861/x
  3. Step 3: Cross multiply
    218,616.52x = 327,970.88 × 70,861
  4. Step 4: Simplify right side
    218,616.52x = 23,240,344,527.68
  5. Step 5: Solve for x
    x = 23,240,344,527.68/218,616.52
  6. Step 6: Final answer
    x = 106,306.44

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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.