Home / 81,196.20-121,812.78-36,835.65

Finding the Fourth Proportional to 81,196.20, 121,812.78 and 36,835.65

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Solution

The fourth proportional to 81,196.20, 121,812.78 and 36,835.65 is: 55,261.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,196.20 : 121,812.78 = 36,835.65 : x
  2. Step 2: Convert to fraction form
    81,196.20/121,812.78 = 36,835.65/x
  3. Step 3: Cross multiply
    81,196.20x = 121,812.78 × 36,835.65
  4. Step 4: Simplify right side
    81,196.20x = 4,487,052,929.61
  5. Step 5: Solve for x
    x = 4,487,052,929.61/81,196.20
  6. Step 6: Final answer
    x = 55,261.86

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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.