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Finding the Fourth Proportional to 172,433.56, 258,713.52 and 72,618.88

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Solution

The fourth proportional to 172,433.56, 258,713.52 and 72,618.88 is: 108,954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,433.56 : 258,713.52 = 72,618.88 : x
  2. Step 2: Convert to fraction form
    172,433.56/258,713.52 = 72,618.88/x
  3. Step 3: Cross multiply
    172,433.56x = 258,713.52 × 72,618.88
  4. Step 4: Simplify right side
    172,433.56x = 18,787,486,063.26
  5. Step 5: Solve for x
    x = 18,787,486,063.26/172,433.56
  6. Step 6: Final answer
    x = 108,954.93

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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.