Home / 121,720.49-168,021.16-108,951.15

Finding the Fourth Proportional to 121,720.49, 168,021.16 and 108,951.15

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Solution

The fourth proportional to 121,720.49, 168,021.16 and 108,951.15 is: 150,394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,720.49 : 168,021.16 = 108,951.15 : x
  2. Step 2: Convert to fraction form
    121,720.49/168,021.16 = 108,951.15/x
  3. Step 3: Cross multiply
    121,720.49x = 168,021.16 × 108,951.15
  4. Step 4: Simplify right side
    121,720.49x = 18,306,098,606.33
  5. Step 5: Solve for x
    x = 18,306,098,606.33/121,720.49
  6. Step 6: Final answer
    x = 150,394.55

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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.