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Finding the Fourth Proportional to 121,966.32, 168,320.61 and 68,250.90

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Solution

The fourth proportional to 121,966.32, 168,320.61 and 68,250.90 is: 94,190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,966.32 : 168,320.61 = 68,250.90 : x
  2. Step 2: Convert to fraction form
    121,966.32/168,320.61 = 68,250.90/x
  3. Step 3: Cross multiply
    121,966.32x = 168,320.61 × 68,250.90
  4. Step 4: Simplify right side
    121,966.32x = 11,488,033,121.05
  5. Step 5: Solve for x
    x = 11,488,033,121.05/121,966.32
  6. Step 6: Final answer
    x = 94,190.21

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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.