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Finding the Fourth Proportional to 121,391.66, 167,519.94 and 70,414.70

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Solution

The fourth proportional to 121,391.66, 167,519.94 and 70,414.70 is: 97,171.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,391.66 : 167,519.94 = 70,414.70 : x
  2. Step 2: Convert to fraction form
    121,391.66/167,519.94 = 70,414.70/x
  3. Step 3: Cross multiply
    121,391.66x = 167,519.94 × 70,414.70
  4. Step 4: Simplify right side
    121,391.66x = 11,795,866,319.12
  5. Step 5: Solve for x
    x = 11,795,866,319.12/121,391.66
  6. Step 6: Final answer
    x = 97,171.97

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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.