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Finding the Fourth Proportional to 121,980.75, 168,340.85 and 68,264.65

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Solution

The fourth proportional to 121,980.75, 168,340.85 and 68,264.65 is: 94,209.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,980.75 : 168,340.85 = 68,264.65 : x
  2. Step 2: Convert to fraction form
    121,980.75/168,340.85 = 68,264.65/x
  3. Step 3: Cross multiply
    121,980.75x = 168,340.85 × 68,264.65
  4. Step 4: Simplify right side
    121,980.75x = 11,491,729,205.95
  5. Step 5: Solve for x
    x = 11,491,729,205.95/121,980.75
  6. Step 6: Final answer
    x = 94,209.37

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1.5x scale

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.