Home / 138,450.62-191,125.64-81,081.97

Finding the Fourth Proportional to 138,450.62, 191,125.64 and 81,081.97

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Solution

The fourth proportional to 138,450.62, 191,125.64 and 81,081.97 is: 111,930.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,450.62 : 191,125.64 = 81,081.97 : x
  2. Step 2: Convert to fraction form
    138,450.62/191,125.64 = 81,081.97/x
  3. Step 3: Cross multiply
    138,450.62x = 191,125.64 × 81,081.97
  4. Step 4: Simplify right side
    138,450.62x = 15,496,843,133.60
  5. Step 5: Solve for x
    x = 15,496,843,133.60/138,450.62
  6. Step 6: Final answer
    x = 111,930.47

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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.