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Finding the Fourth Proportional to 206,600.80, 309,901.20 and 143,615.20

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Solution

The fourth proportional to 206,600.80, 309,901.20 and 143,615.20 is: 215,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,600.80 : 309,901.20 = 143,615.20 : x
  2. Step 2: Convert to fraction form
    206,600.80/309,901.20 = 143,615.20/x
  3. Step 3: Cross multiply
    206,600.80x = 309,901.20 × 143,615.20
  4. Step 4: Simplify right side
    206,600.80x = 44,506,522,818.24
  5. Step 5: Solve for x
    x = 44,506,522,818.24/206,600.80
  6. Step 6: Final answer
    x = 215,422.80

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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.