Home / 138,924.28-208,291.56-66,839.14

Finding the Fourth Proportional to 138,924.28, 208,291.56 and 66,839.14

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Solution

The fourth proportional to 138,924.28, 208,291.56 and 66,839.14 is: 100,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,924.28 : 208,291.56 = 66,839.14 : x
  2. Step 2: Convert to fraction form
    138,924.28/208,291.56 = 66,839.14/x
  3. Step 3: Cross multiply
    138,924.28x = 208,291.56 × 66,839.14
  4. Step 4: Simplify right side
    138,924.28x = 13,922,028,739.66
  5. Step 5: Solve for x
    x = 13,922,028,739.66/138,924.28
  6. Step 6: Final answer
    x = 100,213.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.