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Finding the Fourth Proportional to 121,770.90, 168,042.78 and 68,055.30

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Solution

The fourth proportional to 121,770.90, 168,042.78 and 68,055.30 is: 93,915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,770.90 : 168,042.78 = 68,055.30 : x
  2. Step 2: Convert to fraction form
    121,770.90/168,042.78 = 68,055.30/x
  3. Step 3: Cross multiply
    121,770.90x = 168,042.78 × 68,055.30
  4. Step 4: Simplify right side
    121,770.90x = 11,436,201,805.73
  5. Step 5: Solve for x
    x = 11,436,201,805.73/121,770.90
  6. Step 6: Final answer
    x = 93,915.72

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1.5x scale

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.