Home / 218,778.03-328,035.69-85,499.42

Finding the Fourth Proportional to 218,778.03, 328,035.69 and 85,499.42

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Solution

The fourth proportional to 218,778.03, 328,035.69 and 85,499.42 is: 128,197.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,778.03 : 328,035.69 = 85,499.42 : x
  2. Step 2: Convert to fraction form
    218,778.03/328,035.69 = 85,499.42/x
  3. Step 3: Cross multiply
    218,778.03x = 328,035.69 × 85,499.42
  4. Step 4: Simplify right side
    218,778.03x = 28,046,859,594.12
  5. Step 5: Solve for x
    x = 28,046,859,594.12/218,778.03
  6. Step 6: Final answer
    x = 128,197.79

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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.