Home / 121,811.28-168,101.91-68,100.18

Finding the Fourth Proportional to 121,811.28, 168,101.91 and 68,100.18

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Solution

The fourth proportional to 121,811.28, 168,101.91 and 68,100.18 is: 93,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,811.28 : 168,101.91 = 68,100.18 : x
  2. Step 2: Convert to fraction form
    121,811.28/168,101.91 = 68,100.18/x
  3. Step 3: Cross multiply
    121,811.28x = 168,101.91 × 68,100.18
  4. Step 4: Simplify right side
    121,811.28x = 11,447,770,329.34
  5. Step 5: Solve for x
    x = 11,447,770,329.34/121,811.28
  6. Step 6: Final answer
    x = 93,979.56

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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.