Home / 81,169.91-121,787.15-31,236.60

Finding the Fourth Proportional to 81,169.91, 121,787.15 and 31,236.60

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Solution

The fourth proportional to 81,169.91, 121,787.15 and 31,236.60 is: 46,867.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,169.91 : 121,787.15 = 31,236.60 : x
  2. Step 2: Convert to fraction form
    81,169.91/121,787.15 = 31,236.60/x
  3. Step 3: Cross multiply
    81,169.91x = 121,787.15 × 31,236.60
  4. Step 4: Simplify right side
    81,169.91x = 3,804,216,489.69
  5. Step 5: Solve for x
    x = 3,804,216,489.69/81,169.91
  6. Step 6: Final answer
    x = 46,867.32

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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.