Home / 138,691.44-191,399.63-81,322.79

Finding the Fourth Proportional to 138,691.44, 191,399.63 and 81,322.79

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Solution

The fourth proportional to 138,691.44, 191,399.63 and 81,322.79 is: 112,228.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,691.44 : 191,399.63 = 81,322.79 : x
  2. Step 2: Convert to fraction form
    138,691.44/191,399.63 = 81,322.79/x
  3. Step 3: Cross multiply
    138,691.44x = 191,399.63 × 81,322.79
  4. Step 4: Simplify right side
    138,691.44x = 15,565,150,552.96
  5. Step 5: Solve for x
    x = 15,565,150,552.96/138,691.44
  6. Step 6: Final answer
    x = 112,228.63

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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.