Home / 138,695.23-191,404.84-81,326.57

Finding the Fourth Proportional to 138,695.23, 191,404.84 and 81,326.57

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Solution

The fourth proportional to 138,695.23, 191,404.84 and 81,326.57 is: 112,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,695.23 : 191,404.84 = 81,326.57 : x
  2. Step 2: Convert to fraction form
    138,695.23/191,404.84 = 81,326.57/x
  3. Step 3: Cross multiply
    138,695.23x = 191,404.84 × 81,326.57
  4. Step 4: Simplify right side
    138,695.23x = 15,566,299,118.60
  5. Step 5: Solve for x
    x = 15,566,299,118.60/138,695.23
  6. Step 6: Final answer
    x = 112,233.85

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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.