Home / 212,067.10-317,991.30-78,878.80

Finding the Fourth Proportional to 212,067.10, 317,991.30 and 78,878.80

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Solution

The fourth proportional to 212,067.10, 317,991.30 and 78,878.80 is: 118,277.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,067.10 : 317,991.30 = 78,878.80 : x
  2. Step 2: Convert to fraction form
    212,067.10/317,991.30 = 78,878.80/x
  3. Step 3: Cross multiply
    212,067.10x = 317,991.30 × 78,878.80
  4. Step 4: Simplify right side
    212,067.10x = 25,082,772,154.44
  5. Step 5: Solve for x
    x = 25,082,772,154.44/212,067.10
  6. Step 6: Final answer
    x = 118,277.53

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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.