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Finding the Fourth Proportional to 218,891.82, 328,338.65 and 61,119.82

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Solution

The fourth proportional to 218,891.82, 328,338.65 and 61,119.82 is: 91,679.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,891.82 : 328,338.65 = 61,119.82 : x
  2. Step 2: Convert to fraction form
    218,891.82/328,338.65 = 61,119.82/x
  3. Step 3: Cross multiply
    218,891.82x = 328,338.65 × 61,119.82
  4. Step 4: Simplify right side
    218,891.82x = 20,067,999,187.04
  5. Step 5: Solve for x
    x = 20,067,999,187.04/218,891.82
  6. Step 6: Final answer
    x = 91,679.99

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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.