Home / 100,205.82-138,306.72-62,472.78

Finding the Fourth Proportional to 100,205.82, 138,306.72 and 62,472.78

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Solution

The fourth proportional to 100,205.82, 138,306.72 and 62,472.78 is: 86,226.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,205.82 : 138,306.72 = 62,472.78 : x
  2. Step 2: Convert to fraction form
    100,205.82/138,306.72 = 62,472.78/x
  3. Step 3: Cross multiply
    100,205.82x = 138,306.72 × 62,472.78
  4. Step 4: Simplify right side
    100,205.82x = 8,640,405,291.08
  5. Step 5: Solve for x
    x = 8,640,405,291.08/100,205.82
  6. Step 6: Final answer
    x = 86,226.58

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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.