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Finding the Fourth Proportional to 218,890.82, 328,337.15 and 61,118.82

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Solution

The fourth proportional to 218,890.82, 328,337.15 and 61,118.82 is: 91,678.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,890.82 : 328,337.15 = 61,118.82 : x
  2. Step 2: Convert to fraction form
    218,890.82/328,337.15 = 61,118.82/x
  3. Step 3: Cross multiply
    218,890.82x = 328,337.15 × 61,118.82
  4. Step 4: Simplify right side
    218,890.82x = 20,067,578,864.57
  5. Step 5: Solve for x
    x = 20,067,578,864.57/218,890.82
  6. Step 6: Final answer
    x = 91,678.48

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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.