Home / 138,148.36-190,629.25-77,717.75

Finding the Fourth Proportional to 138,148.36, 190,629.25 and 77,717.75

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Solution

The fourth proportional to 138,148.36, 190,629.25 and 77,717.75 is: 107,241.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,148.36 : 190,629.25 = 77,717.75 : x
  2. Step 2: Convert to fraction form
    138,148.36/190,629.25 = 77,717.75/x
  3. Step 3: Cross multiply
    138,148.36x = 190,629.25 × 77,717.75
  4. Step 4: Simplify right side
    138,148.36x = 14,815,275,246.75
  5. Step 5: Solve for x
    x = 14,815,275,246.75/138,148.36
  6. Step 6: Final answer
    x = 107,241.78

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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.