Home / 158,105.23-218,123.94-100,734.28

Finding the Fourth Proportional to 158,105.23, 218,123.94 and 100,734.28

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Solution

The fourth proportional to 158,105.23, 218,123.94 and 100,734.28 is: 138,974.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,105.23 : 218,123.94 = 100,734.28 : x
  2. Step 2: Convert to fraction form
    158,105.23/218,123.94 = 100,734.28/x
  3. Step 3: Cross multiply
    158,105.23x = 218,123.94 × 100,734.28
  4. Step 4: Simplify right side
    158,105.23x = 21,972,558,046.66
  5. Step 5: Solve for x
    x = 21,972,558,046.66/158,105.23
  6. Step 6: Final answer
    x = 138,974.26

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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.