Home / 87,651.76-120,929.88-49,899.28

Finding the Fourth Proportional to 87,651.76, 120,929.88 and 49,899.28

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Solution

The fourth proportional to 87,651.76, 120,929.88 and 49,899.28 is: 68,844.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,651.76 : 120,929.88 = 49,899.28 : x
  2. Step 2: Convert to fraction form
    87,651.76/120,929.88 = 49,899.28/x
  3. Step 3: Cross multiply
    87,651.76x = 120,929.88 × 49,899.28
  4. Step 4: Simplify right side
    87,651.76x = 6,034,313,942.49
  5. Step 5: Solve for x
    x = 6,034,313,942.49/87,651.76
  6. Step 6: Final answer
    x = 68,844.18

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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.