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Finding the Fourth Proportional to 121,987.92, 168,333.96 and 68,262.96

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Solution

The fourth proportional to 121,987.92, 168,333.96 and 68,262.96 is: 94,197.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,987.92 : 168,333.96 = 68,262.96 : x
  2. Step 2: Convert to fraction form
    121,987.92/168,333.96 = 68,262.96/x
  3. Step 3: Cross multiply
    121,987.92x = 168,333.96 × 68,262.96
  4. Step 4: Simplify right side
    121,987.92x = 11,490,974,378.12
  5. Step 5: Solve for x
    x = 11,490,974,378.12/121,987.92
  6. Step 6: Final answer
    x = 94,197.64

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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.