Home / 87,138.54-120,246.93-49,405.50

Finding the Fourth Proportional to 87,138.54, 120,246.93 and 49,405.50

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Solution

The fourth proportional to 87,138.54, 120,246.93 and 49,405.50 is: 68,177.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,138.54 : 120,246.93 = 49,405.50 : x
  2. Step 2: Convert to fraction form
    87,138.54/120,246.93 = 49,405.50/x
  3. Step 3: Cross multiply
    87,138.54x = 120,246.93 × 49,405.50
  4. Step 4: Simplify right side
    87,138.54x = 5,940,859,700.12
  5. Step 5: Solve for x
    x = 5,940,859,700.12/87,138.54
  6. Step 6: Final answer
    x = 68,177.18

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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.