Home / 81,348.66-121,929.30-31,406.76

Finding the Fourth Proportional to 81,348.66, 121,929.30 and 31,406.76

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Solution

The fourth proportional to 81,348.66, 121,929.30 and 31,406.76 is: 47,073.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.66 : 121,929.30 = 31,406.76 : x
  2. Step 2: Convert to fraction form
    81,348.66/121,929.30 = 31,406.76/x
  3. Step 3: Cross multiply
    81,348.66x = 121,929.30 × 31,406.76
  4. Step 4: Simplify right side
    81,348.66x = 3,829,404,262.07
  5. Step 5: Solve for x
    x = 3,829,404,262.07/81,348.66
  6. Step 6: Final answer
    x = 47,073.97

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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.