Home / 81,156.06-121,725.45-38,451.18

Finding the Fourth Proportional to 81,156.06, 121,725.45 and 38,451.18

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Solution

The fourth proportional to 81,156.06, 121,725.45 and 38,451.18 is: 57,672.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,156.06 : 121,725.45 = 38,451.18 : x
  2. Step 2: Convert to fraction form
    81,156.06/121,725.45 = 38,451.18/x
  3. Step 3: Cross multiply
    81,156.06x = 121,725.45 × 38,451.18
  4. Step 4: Simplify right side
    81,156.06x = 4,680,487,188.53
  5. Step 5: Solve for x
    x = 4,680,487,188.53/81,156.06
  6. Step 6: Final answer
    x = 57,672.68

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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.