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Finding the Fourth Proportional to 121,112.50, 167,135.25 and 68,120.50

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Solution

The fourth proportional to 121,112.50, 167,135.25 and 68,120.50 is: 94,006.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,112.50 : 167,135.25 = 68,120.50 : x
  2. Step 2: Convert to fraction form
    121,112.50/167,135.25 = 68,120.50/x
  3. Step 3: Cross multiply
    121,112.50x = 167,135.25 × 68,120.50
  4. Step 4: Simplify right side
    121,112.50x = 11,385,336,797.63
  5. Step 5: Solve for x
    x = 11,385,336,797.63/121,112.50
  6. Step 6: Final answer
    x = 94,006.29

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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.