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Finding the Fourth Proportional to 121,776.62, 168,059.61 and 68,063.90

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Solution

The fourth proportional to 121,776.62, 168,059.61 and 68,063.90 is: 93,932.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,776.62 : 168,059.61 = 68,063.90 : x
  2. Step 2: Convert to fraction form
    121,776.62/168,059.61 = 68,063.90/x
  3. Step 3: Cross multiply
    121,776.62x = 168,059.61 × 68,063.90
  4. Step 4: Simplify right side
    121,776.62x = 11,438,791,648.78
  5. Step 5: Solve for x
    x = 11,438,791,648.78/121,776.62
  6. Step 6: Final answer
    x = 93,932.58

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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.