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Finding the Fourth Proportional to 121,068, 167,074.56 and 70,757.28

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Solution

The fourth proportional to 121,068, 167,074.56 and 70,757.28 is: 97,645.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,068 : 167,074.56 = 70,757.28 : x
  2. Step 2: Convert to fraction form
    121,068/167,074.56 = 70,757.28/x
  3. Step 3: Cross multiply
    121,068x = 167,074.56 × 70,757.28
  4. Step 4: Simplify right side
    121,068x = 11,821,741,422.80
  5. Step 5: Solve for x
    x = 11,821,741,422.80/121,068
  6. Step 6: Final answer
    x = 97,645.47

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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.