Home / 121,921.87-168,245.40-68,196.52

Finding the Fourth Proportional to 121,921.87, 168,245.40 and 68,196.52

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Solution

The fourth proportional to 121,921.87, 168,245.40 and 68,196.52 is: 94,107.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,921.87 : 168,245.40 = 68,196.52 : x
  2. Step 2: Convert to fraction form
    121,921.87/168,245.40 = 68,196.52/x
  3. Step 3: Cross multiply
    121,921.87x = 168,245.40 × 68,196.52
  4. Step 4: Simplify right side
    121,921.87x = 11,473,750,786.01
  5. Step 5: Solve for x
    x = 11,473,750,786.01/121,921.87
  6. Step 6: Final answer
    x = 94,107.40

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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.