Home / 81,286.17-121,916.67-31,358.98

Finding the Fourth Proportional to 81,286.17, 121,916.67 and 31,358.98

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Solution

The fourth proportional to 81,286.17, 121,916.67 and 31,358.98 is: 47,033.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,286.17 : 121,916.67 = 31,358.98 : x
  2. Step 2: Convert to fraction form
    81,286.17/121,916.67 = 31,358.98/x
  3. Step 3: Cross multiply
    81,286.17x = 121,916.67 × 31,358.98
  4. Step 4: Simplify right side
    81,286.17x = 3,823,182,416.20
  5. Step 5: Solve for x
    x = 3,823,182,416.20/81,286.17
  6. Step 6: Final answer
    x = 47,033.61

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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.