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Finding the Fourth Proportional to 121,791.67, 167,919.56 and 93,146.47

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Solution

The fourth proportional to 121,791.67, 167,919.56 and 93,146.47 is: 128,425.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,791.67 : 167,919.56 = 93,146.47 : x
  2. Step 2: Convert to fraction form
    121,791.67/167,919.56 = 93,146.47/x
  3. Step 3: Cross multiply
    121,791.67x = 167,919.56 × 93,146.47
  4. Step 4: Simplify right side
    121,791.67x = 15,641,113,721.72
  5. Step 5: Solve for x
    x = 15,641,113,721.72/121,791.67
  6. Step 6: Final answer
    x = 128,425.15

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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.