Home / 138,733.19-191,452.68-81,360.81

Finding the Fourth Proportional to 138,733.19, 191,452.68 and 81,360.81

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Solution

The fourth proportional to 138,733.19, 191,452.68 and 81,360.81 is: 112,278.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,733.19 : 191,452.68 = 81,360.81 : x
  2. Step 2: Convert to fraction form
    138,733.19/191,452.68 = 81,360.81/x
  3. Step 3: Cross multiply
    138,733.19x = 191,452.68 × 81,360.81
  4. Step 4: Simplify right side
    138,733.19x = 15,576,745,121.47
  5. Step 5: Solve for x
    x = 15,576,745,121.47/138,733.19
  6. Step 6: Final answer
    x = 112,278.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.