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Finding the Fourth Proportional to 206,931.20, 310,323.90 and 73,815.80

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Solution

The fourth proportional to 206,931.20, 310,323.90 and 73,815.80 is: 110,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,931.20 : 310,323.90 = 73,815.80 : x
  2. Step 2: Convert to fraction form
    206,931.20/310,323.90 = 73,815.80/x
  3. Step 3: Cross multiply
    206,931.20x = 310,323.90 × 73,815.80
  4. Step 4: Simplify right side
    206,931.20x = 22,906,806,937.62
  5. Step 5: Solve for x
    x = 22,906,806,937.62/206,931.20
  6. Step 6: Final answer
    x = 110,697.70

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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.