Home / 212,143.20-318,357.84-87,481.44

Finding the Fourth Proportional to 212,143.20, 318,357.84 and 87,481.44

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Solution

The fourth proportional to 212,143.20, 318,357.84 and 87,481.44 is: 131,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,143.20 : 318,357.84 = 87,481.44 : x
  2. Step 2: Convert to fraction form
    212,143.20/318,357.84 = 87,481.44/x
  3. Step 3: Cross multiply
    212,143.20x = 318,357.84 × 87,481.44
  4. Step 4: Simplify right side
    212,143.20x = 27,850,402,278.49
  5. Step 5: Solve for x
    x = 27,850,402,278.49/212,143.20
  6. Step 6: Final answer
    x = 131,281.15

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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.