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Finding the Fourth Proportional to 218,816.32, 328,279.83 and 61,044.65

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Solution

The fourth proportional to 218,816.32, 328,279.83 and 61,044.65 is: 91,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,816.32 : 328,279.83 = 61,044.65 : x
  2. Step 2: Convert to fraction form
    218,816.32/328,279.83 = 61,044.65/x
  3. Step 3: Cross multiply
    218,816.32x = 328,279.83 × 61,044.65
  4. Step 4: Simplify right side
    218,816.32x = 20,039,727,324.41
  5. Step 5: Solve for x
    x = 20,039,727,324.41/218,816.32
  6. Step 6: Final answer
    x = 91,582.42

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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.