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Finding the Fourth Proportional to 172,957.20, 259,435.80 and 143,432.70

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Solution

The fourth proportional to 172,957.20, 259,435.80 and 143,432.70 is: 215,149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,957.20 : 259,435.80 = 143,432.70 : x
  2. Step 2: Convert to fraction form
    172,957.20/259,435.80 = 143,432.70/x
  3. Step 3: Cross multiply
    172,957.20x = 259,435.80 × 143,432.70
  4. Step 4: Simplify right side
    172,957.20x = 37,211,577,270.66
  5. Step 5: Solve for x
    x = 37,211,577,270.66/172,957.20
  6. Step 6: Final answer
    x = 215,149.05

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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.