Home / 100,311.56-138,429.96-54,371.36

Finding the Fourth Proportional to 100,311.56, 138,429.96 and 54,371.36

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Solution

The fourth proportional to 100,311.56, 138,429.96 and 54,371.36 is: 75,032.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,311.56 : 138,429.96 = 54,371.36 : x
  2. Step 2: Convert to fraction form
    100,311.56/138,429.96 = 54,371.36/x
  3. Step 3: Cross multiply
    100,311.56x = 138,429.96 × 54,371.36
  4. Step 4: Simplify right side
    100,311.56x = 7,526,625,189.95
  5. Step 5: Solve for x
    x = 7,526,625,189.95/100,311.56
  6. Step 6: Final answer
    x = 75,032.48

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1.5x scale

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.