Home / 138,503.28-191,067.72-90,735.60

Finding the Fourth Proportional to 138,503.28, 191,067.72 and 90,735.60

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Solution

The fourth proportional to 138,503.28, 191,067.72 and 90,735.60 is: 125,171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,503.28 : 191,067.72 = 90,735.60 : x
  2. Step 2: Convert to fraction form
    138,503.28/191,067.72 = 90,735.60/x
  3. Step 3: Cross multiply
    138,503.28x = 191,067.72 × 90,735.60
  4. Step 4: Simplify right side
    138,503.28x = 17,336,644,214.83
  5. Step 5: Solve for x
    x = 17,336,644,214.83/138,503.28
  6. Step 6: Final answer
    x = 125,171.36

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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.