Home / 138,799.91-191,536.61-81,431.25

Finding the Fourth Proportional to 138,799.91, 191,536.61 and 81,431.25

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Solution

The fourth proportional to 138,799.91, 191,536.61 and 81,431.25 is: 112,370.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799.91 : 191,536.61 = 81,431.25 : x
  2. Step 2: Convert to fraction form
    138,799.91/191,536.61 = 81,431.25/x
  3. Step 3: Cross multiply
    138,799.91x = 191,536.61 × 81,431.25
  4. Step 4: Simplify right side
    138,799.91x = 15,597,065,165.91
  5. Step 5: Solve for x
    x = 15,597,065,165.91/138,799.91
  6. Step 6: Final answer
    x = 112,370.86

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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.