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Finding the Fourth Proportional to 121,764.42, 168,038.52 and 68,049.57

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Solution

The fourth proportional to 121,764.42, 168,038.52 and 68,049.57 is: 93,910.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,764.42 : 168,038.52 = 68,049.57 : x
  2. Step 2: Convert to fraction form
    121,764.42/168,038.52 = 68,049.57/x
  3. Step 3: Cross multiply
    121,764.42x = 168,038.52 × 68,049.57
  4. Step 4: Simplify right side
    121,764.42x = 11,434,949,029.44
  5. Step 5: Solve for x
    x = 11,434,949,029.44/121,764.42
  6. Step 6: Final answer
    x = 93,910.43

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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.