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Finding the Fourth Proportional to 121,357, 167,473.46 and 67,645.42

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Solution

The fourth proportional to 121,357, 167,473.46 and 67,645.42 is: 93,351.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,357 : 167,473.46 = 67,645.42 : x
  2. Step 2: Convert to fraction form
    121,357/167,473.46 = 67,645.42/x
  3. Step 3: Cross multiply
    121,357x = 167,473.46 × 67,645.42
  4. Step 4: Simplify right side
    121,357x = 11,328,812,540.55
  5. Step 5: Solve for x
    x = 11,328,812,540.55/121,357
  6. Step 6: Final answer
    x = 93,351.13

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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.