Home / 121,380.38-167,505.63-67,668.78

Finding the Fourth Proportional to 121,380.38, 167,505.63 and 67,668.78

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Solution

The fourth proportional to 121,380.38, 167,505.63 and 67,668.78 is: 93,383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,380.38 : 167,505.63 = 67,668.78 : x
  2. Step 2: Convert to fraction form
    121,380.38/167,505.63 = 67,668.78/x
  3. Step 3: Cross multiply
    121,380.38x = 167,505.63 × 67,668.78
  4. Step 4: Simplify right side
    121,380.38x = 11,334,901,625.23
  5. Step 5: Solve for x
    x = 11,334,901,625.23/121,380.38
  6. Step 6: Final answer
    x = 93,383.31

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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.