Home / 218,976.20-328,436.06-69,231.70

Finding the Fourth Proportional to 218,976.20, 328,436.06 and 69,231.70

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Solution

The fourth proportional to 218,976.20, 328,436.06 and 69,231.70 is: 103,838.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,976.20 : 328,436.06 = 69,231.70 : x
  2. Step 2: Convert to fraction form
    218,976.20/328,436.06 = 69,231.70/x
  3. Step 3: Cross multiply
    218,976.20x = 328,436.06 × 69,231.70
  4. Step 4: Simplify right side
    218,976.20x = 22,738,186,775.10
  5. Step 5: Solve for x
    x = 22,738,186,775.10/218,976.20
  6. Step 6: Final answer
    x = 103,838.62

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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.