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Finding the Fourth Proportional to 172,122.44, 258,284.70 and 72,274.95

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Solution

The fourth proportional to 172,122.44, 258,284.70 and 72,274.95 is: 108,454.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,122.44 : 258,284.70 = 72,274.95 : x
  2. Step 2: Convert to fraction form
    172,122.44/258,284.70 = 72,274.95/x
  3. Step 3: Cross multiply
    172,122.44x = 258,284.70 × 72,274.95
  4. Step 4: Simplify right side
    172,122.44x = 18,667,513,778.27
  5. Step 5: Solve for x
    x = 18,667,513,778.27/172,122.44
  6. Step 6: Final answer
    x = 108,454.86

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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.