Home / 100,134.26-138,184.19-57,112.64

Finding the Fourth Proportional to 100,134.26, 138,184.19 and 57,112.64

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Solution

The fourth proportional to 100,134.26, 138,184.19 and 57,112.64 is: 78,814.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,134.26 : 138,184.19 = 57,112.64 : x
  2. Step 2: Convert to fraction form
    100,134.26/138,184.19 = 57,112.64/x
  3. Step 3: Cross multiply
    100,134.26x = 138,184.19 × 57,112.64
  4. Step 4: Simplify right side
    100,134.26x = 7,892,062,920.68
  5. Step 5: Solve for x
    x = 7,892,062,920.68/100,134.26
  6. Step 6: Final answer
    x = 78,814.82

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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.