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Finding the Fourth Proportional to 218,799.92, 328,170.72 and 61,015.16

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Solution

The fourth proportional to 218,799.92, 328,170.72 and 61,015.16 is: 91,514.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,799.92 : 328,170.72 = 61,015.16 : x
  2. Step 2: Convert to fraction form
    218,799.92/328,170.72 = 61,015.16/x
  3. Step 3: Cross multiply
    218,799.92x = 328,170.72 × 61,015.16
  4. Step 4: Simplify right side
    218,799.92x = 20,023,388,463.50
  5. Step 5: Solve for x
    x = 20,023,388,463.50/218,799.92
  6. Step 6: Final answer
    x = 91,514.61

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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.