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Finding the Fourth Proportional to 121,634.68, 167,855.79 and 67,919.66

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Solution

The fourth proportional to 121,634.68, 167,855.79 and 67,919.66 is: 93,729.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,634.68 : 167,855.79 = 67,919.66 : x
  2. Step 2: Convert to fraction form
    121,634.68/167,855.79 = 67,919.66/x
  3. Step 3: Cross multiply
    121,634.68x = 167,855.79 × 67,919.66
  4. Step 4: Simplify right side
    121,634.68x = 11,400,708,185.83
  5. Step 5: Solve for x
    x = 11,400,708,185.83/121,634.68
  6. Step 6: Final answer
    x = 93,729.10

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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.