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Finding the Fourth Proportional to 87,518.88, 120,780.72 and 49,805.28

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Solution

The fourth proportional to 87,518.88, 120,780.72 and 49,805.28 is: 68,733.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,518.88 : 120,780.72 = 49,805.28 : x
  2. Step 2: Convert to fraction form
    87,518.88/120,780.72 = 49,805.28/x
  3. Step 3: Cross multiply
    87,518.88x = 120,780.72 × 49,805.28
  4. Step 4: Simplify right side
    87,518.88x = 6,015,517,578.20
  5. Step 5: Solve for x
    x = 6,015,517,578.20/87,518.88
  6. Step 6: Final answer
    x = 68,733.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.