Home / 218,968.12-328,306.32-78,708.52

Finding the Fourth Proportional to 218,968.12, 328,306.32 and 78,708.52

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Solution

The fourth proportional to 218,968.12, 328,306.32 and 78,708.52 is: 118,010.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,968.12 : 328,306.32 = 78,708.52 : x
  2. Step 2: Convert to fraction form
    218,968.12/328,306.32 = 78,708.52/x
  3. Step 3: Cross multiply
    218,968.12x = 328,306.32 × 78,708.52
  4. Step 4: Simplify right side
    218,968.12x = 25,840,504,553.85
  5. Step 5: Solve for x
    x = 25,840,504,553.85/218,968.12
  6. Step 6: Final answer
    x = 118,010.35

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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.