Home / 218,986.10-328,565.55-85,843.70

Finding the Fourth Proportional to 218,986.10, 328,565.55 and 85,843.70

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Solution

The fourth proportional to 218,986.10, 328,565.55 and 85,843.70 is: 128,799.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,986.10 : 328,565.55 = 85,843.70 : x
  2. Step 2: Convert to fraction form
    218,986.10/328,565.55 = 85,843.70/x
  3. Step 3: Cross multiply
    218,986.10x = 328,565.55 × 85,843.70
  4. Step 4: Simplify right side
    218,986.10x = 28,205,282,504.54
  5. Step 5: Solve for x
    x = 28,205,282,504.54/218,986.10
  6. Step 6: Final answer
    x = 128,799.42

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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.