Home / 81,282.73-121,934.48-31,377.11

Finding the Fourth Proportional to 81,282.73, 121,934.48 and 31,377.11

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Solution

The fourth proportional to 81,282.73, 121,934.48 and 31,377.11 is: 47,069.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,282.73 : 121,934.48 = 31,377.11 : x
  2. Step 2: Convert to fraction form
    81,282.73/121,934.48 = 31,377.11/x
  3. Step 3: Cross multiply
    81,282.73x = 121,934.48 × 31,377.11
  4. Step 4: Simplify right side
    81,282.73x = 3,825,951,001.69
  5. Step 5: Solve for x
    x = 3,825,951,001.69/81,282.73
  6. Step 6: Final answer
    x = 47,069.67

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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.