Home / 100,306.74-138,427.55-57,293.31

Finding the Fourth Proportional to 100,306.74, 138,427.55 and 57,293.31

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Solution

The fourth proportional to 100,306.74, 138,427.55 and 57,293.31 is: 79,067.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,306.74 : 138,427.55 = 57,293.31 : x
  2. Step 2: Convert to fraction form
    100,306.74/138,427.55 = 57,293.31/x
  3. Step 3: Cross multiply
    100,306.74x = 138,427.55 × 57,293.31
  4. Step 4: Simplify right side
    100,306.74x = 7,930,972,534.69
  5. Step 5: Solve for x
    x = 7,930,972,534.69/100,306.74
  6. Step 6: Final answer
    x = 79,067.19

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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.