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Finding the Fourth Proportional to 206,816.80, 310,282.80 and 101,639.20

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Solution

The fourth proportional to 206,816.80, 310,282.80 and 101,639.20 is: 152,487.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,816.80 : 310,282.80 = 101,639.20 : x
  2. Step 2: Convert to fraction form
    206,816.80/310,282.80 = 101,639.20/x
  3. Step 3: Cross multiply
    206,816.80x = 310,282.80 × 101,639.20
  4. Step 4: Simplify right side
    206,816.80x = 31,536,895,565.76
  5. Step 5: Solve for x
    x = 31,536,895,565.76/206,816.80
  6. Step 6: Final answer
    x = 152,487.11

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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.