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Finding the Fourth Proportional to 218,716.72, 328,016.10 and 92,357.80

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Solution

The fourth proportional to 218,716.72, 328,016.10 and 92,357.80 is: 138,511.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,716.72 : 328,016.10 = 92,357.80 : x
  2. Step 2: Convert to fraction form
    218,716.72/328,016.10 = 92,357.80/x
  3. Step 3: Cross multiply
    218,716.72x = 328,016.10 × 92,357.80
  4. Step 4: Simplify right side
    218,716.72x = 30,294,845,360.58
  5. Step 5: Solve for x
    x = 30,294,845,360.58/218,716.72
  6. Step 6: Final answer
    x = 138,511.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.