Home / 218,971.14-328,310.79-78,711.54

Finding the Fourth Proportional to 218,971.14, 328,310.79 and 78,711.54

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Solution

The fourth proportional to 218,971.14, 328,310.79 and 78,711.54 is: 118,014.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,971.14 : 328,310.79 = 78,711.54 : x
  2. Step 2: Convert to fraction form
    218,971.14/328,310.79 = 78,711.54/x
  3. Step 3: Cross multiply
    218,971.14x = 328,310.79 × 78,711.54
  4. Step 4: Simplify right side
    218,971.14x = 25,841,847,879.52
  5. Step 5: Solve for x
    x = 25,841,847,879.52/218,971.14
  6. Step 6: Final answer
    x = 118,014.86

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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.