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Finding the Fourth Proportional to 218,815.32, 328,278.33 and 61,043.65

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Solution

The fourth proportional to 218,815.32, 328,278.33 and 61,043.65 is: 91,580.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,815.32 : 328,278.33 = 61,043.65 : x
  2. Step 2: Convert to fraction form
    218,815.32/328,278.33 = 61,043.65/x
  3. Step 3: Cross multiply
    218,815.32x = 328,278.33 × 61,043.65
  4. Step 4: Simplify right side
    218,815.32x = 20,039,308,147.19
  5. Step 5: Solve for x
    x = 20,039,308,147.19/218,815.32
  6. Step 6: Final answer
    x = 91,580.92

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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.