Home / 100,238.12-138,323.66-54,916.33

Finding the Fourth Proportional to 100,238.12, 138,323.66 and 54,916.33

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Solution

The fourth proportional to 100,238.12, 138,323.66 and 54,916.33 is: 75,781.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,238.12 : 138,323.66 = 54,916.33 : x
  2. Step 2: Convert to fraction form
    100,238.12/138,323.66 = 54,916.33/x
  3. Step 3: Cross multiply
    100,238.12x = 138,323.66 × 54,916.33
  4. Step 4: Simplify right side
    100,238.12x = 7,596,227,067.75
  5. Step 5: Solve for x
    x = 7,596,227,067.75/100,238.12
  6. Step 6: Final answer
    x = 75,781.82

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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.