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Finding the Fourth Proportional to 121,885.32, 168,217.32 and 68,173.32

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Solution

The fourth proportional to 121,885.32, 168,217.32 and 68,173.32 is: 94,087.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,885.32 : 168,217.32 = 68,173.32 : x
  2. Step 2: Convert to fraction form
    121,885.32/168,217.32 = 68,173.32/x
  3. Step 3: Cross multiply
    121,885.32x = 168,217.32 × 68,173.32
  4. Step 4: Simplify right side
    121,885.32x = 11,467,933,185.90
  5. Step 5: Solve for x
    x = 11,467,933,185.90/121,885.32
  6. Step 6: Final answer
    x = 94,087.89

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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.