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Finding the Fourth Proportional to 121,720.60, 167,959.20 and 68,003.56

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Solution

The fourth proportional to 121,720.60, 167,959.20 and 68,003.56 is: 93,836.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,720.60 : 167,959.20 = 68,003.56 : x
  2. Step 2: Convert to fraction form
    121,720.60/167,959.20 = 68,003.56/x
  3. Step 3: Cross multiply
    121,720.60x = 167,959.20 × 68,003.56
  4. Step 4: Simplify right side
    121,720.60x = 11,421,823,534.75
  5. Step 5: Solve for x
    x = 11,421,823,534.75/121,720.60
  6. Step 6: Final answer
    x = 93,836.41

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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.