Home / 100,067.28-138,091.80-54,744.80

Finding the Fourth Proportional to 100,067.28, 138,091.80 and 54,744.80

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Solution

The fourth proportional to 100,067.28, 138,091.80 and 54,744.80 is: 75,547.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,067.28 : 138,091.80 = 54,744.80 : x
  2. Step 2: Convert to fraction form
    100,067.28/138,091.80 = 54,744.80/x
  3. Step 3: Cross multiply
    100,067.28x = 138,091.80 × 54,744.80
  4. Step 4: Simplify right side
    100,067.28x = 7,559,807,972.64
  5. Step 5: Solve for x
    x = 7,559,807,972.64/100,067.28
  6. Step 6: Final answer
    x = 75,547.25

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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.