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Finding the Fourth Proportional to 121,982.01, 168,342.57 and 68,265.90

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Solution

The fourth proportional to 121,982.01, 168,342.57 and 68,265.90 is: 94,211.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,982.01 : 168,342.57 = 68,265.90 : x
  2. Step 2: Convert to fraction form
    121,982.01/168,342.57 = 68,265.90/x
  3. Step 3: Cross multiply
    121,982.01x = 168,342.57 × 68,265.90
  4. Step 4: Simplify right side
    121,982.01x = 11,492,057,049.36
  5. Step 5: Solve for x
    x = 11,492,057,049.36/121,982.01
  6. Step 6: Final answer
    x = 94,211.08

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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.