Home / 212,610.72-318,955.32-87,961.44

Finding the Fourth Proportional to 212,610.72, 318,955.32 and 87,961.44

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Solution

The fourth proportional to 212,610.72, 318,955.32 and 87,961.44 is: 131,958.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,610.72 : 318,955.32 = 87,961.44 : x
  2. Step 2: Convert to fraction form
    212,610.72/318,955.32 = 87,961.44/x
  3. Step 3: Cross multiply
    212,610.72x = 318,955.32 × 87,961.44
  4. Step 4: Simplify right side
    212,610.72x = 28,055,769,242.86
  5. Step 5: Solve for x
    x = 28,055,769,242.86/212,610.72
  6. Step 6: Final answer
    x = 131,958.39

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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.