Home / 78,067.20-117,101.07-18,902.79

Finding the Fourth Proportional to 78,067.20, 117,101.07 and 18,902.79

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Solution

The fourth proportional to 78,067.20, 117,101.07 and 18,902.79 is: 28,354.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067.20 : 117,101.07 = 18,902.79 : x
  2. Step 2: Convert to fraction form
    78,067.20/117,101.07 = 18,902.79/x
  3. Step 3: Cross multiply
    78,067.20x = 117,101.07 × 18,902.79
  4. Step 4: Simplify right side
    78,067.20x = 2,213,536,934.99
  5. Step 5: Solve for x
    x = 2,213,536,934.99/78,067.20
  6. Step 6: Final answer
    x = 28,354.25

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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.