Home / 218,945.93-328,221.23-78,671.75

Finding the Fourth Proportional to 218,945.93, 328,221.23 and 78,671.75

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Solution

The fourth proportional to 218,945.93, 328,221.23 and 78,671.75 is: 117,936.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,945.93 : 328,221.23 = 78,671.75 : x
  2. Step 2: Convert to fraction form
    218,945.93/328,221.23 = 78,671.75/x
  3. Step 3: Cross multiply
    218,945.93x = 328,221.23 × 78,671.75
  4. Step 4: Simplify right side
    218,945.93x = 25,821,736,516.79
  5. Step 5: Solve for x
    x = 25,821,736,516.79/218,945.93
  6. Step 6: Final answer
    x = 117,936.59

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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.