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Finding the Fourth Proportional to 121,776.56, 168,031.14 and 68,062.04

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Solution

The fourth proportional to 121,776.56, 168,031.14 and 68,062.04 is: 93,914.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,776.56 : 168,031.14 = 68,062.04 : x
  2. Step 2: Convert to fraction form
    121,776.56/168,031.14 = 68,062.04/x
  3. Step 3: Cross multiply
    121,776.56x = 168,031.14 × 68,062.04
  4. Step 4: Simplify right side
    121,776.56x = 11,436,542,171.93
  5. Step 5: Solve for x
    x = 11,436,542,171.93/121,776.56
  6. Step 6: Final answer
    x = 93,914.15

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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.