Home / 121,889.28-168,190.40-68,171.52

Finding the Fourth Proportional to 121,889.28, 168,190.40 and 68,171.52

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Solution

The fourth proportional to 121,889.28, 168,190.40 and 68,171.52 is: 94,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,889.28 : 168,190.40 = 68,171.52 : x
  2. Step 2: Convert to fraction form
    121,889.28/168,190.40 = 68,171.52/x
  3. Step 3: Cross multiply
    121,889.28x = 168,190.40 × 68,171.52
  4. Step 4: Simplify right side
    121,889.28x = 11,465,795,217.41
  5. Step 5: Solve for x
    x = 11,465,795,217.41/121,889.28
  6. Step 6: Final answer
    x = 94,067.30

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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.