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Finding the Fourth Proportional to 173,543.78, 260,348.25 and 78,780.61

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Solution

The fourth proportional to 173,543.78, 260,348.25 and 78,780.61 is: 118,185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,543.78 : 260,348.25 = 78,780.61 : x
  2. Step 2: Convert to fraction form
    173,543.78/260,348.25 = 78,780.61/x
  3. Step 3: Cross multiply
    173,543.78x = 260,348.25 × 78,780.61
  4. Step 4: Simplify right side
    173,543.78x = 20,510,394,272.87
  5. Step 5: Solve for x
    x = 20,510,394,272.87/173,543.78
  6. Step 6: Final answer
    x = 118,185.71

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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.