Home / 218,771.64-328,011.60-78,512.04

Finding the Fourth Proportional to 218,771.64, 328,011.60 and 78,512.04

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Solution

The fourth proportional to 218,771.64, 328,011.60 and 78,512.04 is: 117,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,771.64 : 328,011.60 = 78,512.04 : x
  2. Step 2: Convert to fraction form
    218,771.64/328,011.60 = 78,512.04/x
  3. Step 3: Cross multiply
    218,771.64x = 328,011.60 × 78,512.04
  4. Step 4: Simplify right side
    218,771.64x = 25,752,859,859.66
  5. Step 5: Solve for x
    x = 25,752,859,859.66/218,771.64
  6. Step 6: Final answer
    x = 117,715.71

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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.