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Finding the Fourth Proportional to 206,863.50, 310,108.05 and 143,713.20

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Solution

The fourth proportional to 206,863.50, 310,108.05 and 143,713.20 is: 215,439.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,863.50 : 310,108.05 = 143,713.20 : x
  2. Step 2: Convert to fraction form
    206,863.50/310,108.05 = 143,713.20/x
  3. Step 3: Cross multiply
    206,863.50x = 310,108.05 × 143,713.20
  4. Step 4: Simplify right side
    206,863.50x = 44,566,620,211.26
  5. Step 5: Solve for x
    x = 44,566,620,211.26/206,863.50
  6. Step 6: Final answer
    x = 215,439.75

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1.5x scale

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.