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Finding the Fourth Proportional to 121,476.92, 167,638.40 and 67,760.54

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Solution

The fourth proportional to 121,476.92, 167,638.40 and 67,760.54 is: 93,509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,476.92 : 167,638.40 = 67,760.54 : x
  2. Step 2: Convert to fraction form
    121,476.92/167,638.40 = 67,760.54/x
  3. Step 3: Cross multiply
    121,476.92x = 167,638.40 × 67,760.54
  4. Step 4: Simplify right side
    121,476.92x = 11,359,268,508.74
  5. Step 5: Solve for x
    x = 11,359,268,508.74/121,476.92
  6. Step 6: Final answer
    x = 93,509.68

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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.