Home / 81,219.12-121,813.78-36,835.20

Finding the Fourth Proportional to 81,219.12, 121,813.78 and 36,835.20

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Solution

The fourth proportional to 81,219.12, 121,813.78 and 36,835.20 is: 55,246.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,219.12 : 121,813.78 = 36,835.20 : x
  2. Step 2: Convert to fraction form
    81,219.12/121,813.78 = 36,835.20/x
  3. Step 3: Cross multiply
    81,219.12x = 121,813.78 × 36,835.20
  4. Step 4: Simplify right side
    81,219.12x = 4,487,034,949.06
  5. Step 5: Solve for x
    x = 4,487,034,949.06/81,219.12
  6. Step 6: Final answer
    x = 55,246.04

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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.