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Finding the Fourth Proportional to 121,760.58, 168,033.20 and 68,045.74

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Solution

The fourth proportional to 121,760.58, 168,033.20 and 68,045.74 is: 93,905.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,760.58 : 168,033.20 = 68,045.74 : x
  2. Step 2: Convert to fraction form
    121,760.58/168,033.20 = 68,045.74/x
  3. Step 3: Cross multiply
    121,760.58x = 168,033.20 × 68,045.74
  4. Step 4: Simplify right side
    121,760.58x = 11,433,943,608.68
  5. Step 5: Solve for x
    x = 11,433,943,608.68/121,760.58
  6. Step 6: Final answer
    x = 93,905.14

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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.