Home / 81,246.84-121,330.40-80,367.18

Finding the Fourth Proportional to 81,246.84, 121,330.40 and 80,367.18

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Solution

The fourth proportional to 81,246.84, 121,330.40 and 80,367.18 is: 120,016.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,246.84 : 121,330.40 = 80,367.18 : x
  2. Step 2: Convert to fraction form
    81,246.84/121,330.40 = 80,367.18/x
  3. Step 3: Cross multiply
    81,246.84x = 121,330.40 × 80,367.18
  4. Step 4: Simplify right side
    81,246.84x = 9,750,982,096.27
  5. Step 5: Solve for x
    x = 9,750,982,096.27/81,246.84
  6. Step 6: Final answer
    x = 120,016.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.