Home / 138,471.66-191,104.38-81,901.26

Finding the Fourth Proportional to 138,471.66, 191,104.38 and 81,901.26

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Solution

The fourth proportional to 138,471.66, 191,104.38 and 81,901.26 is: 113,031.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,471.66 : 191,104.38 = 81,901.26 : x
  2. Step 2: Convert to fraction form
    138,471.66/191,104.38 = 81,901.26/x
  3. Step 3: Cross multiply
    138,471.66x = 191,104.38 × 81,901.26
  4. Step 4: Simplify right side
    138,471.66x = 15,651,689,513.52
  5. Step 5: Solve for x
    x = 15,651,689,513.52/138,471.66
  6. Step 6: Final answer
    x = 113,031.72

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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.