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Finding the Fourth Proportional to 171,967.59, 258,049.80 and 66,772.89

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Solution

The fourth proportional to 171,967.59, 258,049.80 and 66,772.89 is: 100,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,967.59 : 258,049.80 = 66,772.89 : x
  2. Step 2: Convert to fraction form
    171,967.59/258,049.80 = 66,772.89/x
  3. Step 3: Cross multiply
    171,967.59x = 258,049.80 × 66,772.89
  4. Step 4: Simplify right side
    171,967.59x = 17,230,730,909.92
  5. Step 5: Solve for x
    x = 17,230,730,909.92/171,967.59
  6. Step 6: Final answer
    x = 100,197.55

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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.