Home / 206,512.39-309,881.40-80,157.61

Finding the Fourth Proportional to 206,512.39, 309,881.40 and 80,157.61

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Solution

The fourth proportional to 206,512.39, 309,881.40 and 80,157.61 is: 120,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,512.39 : 309,881.40 = 80,157.61 : x
  2. Step 2: Convert to fraction form
    206,512.39/309,881.40 = 80,157.61/x
  3. Step 3: Cross multiply
    206,512.39x = 309,881.40 × 80,157.61
  4. Step 4: Simplify right side
    206,512.39x = 24,839,352,407.45
  5. Step 5: Solve for x
    x = 24,839,352,407.45/206,512.39
  6. Step 6: Final answer
    x = 120,280.20

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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.