Home / 212,620.72-318,970.32-87,971.44

Finding the Fourth Proportional to 212,620.72, 318,970.32 and 87,971.44

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Solution

The fourth proportional to 212,620.72, 318,970.32 and 87,971.44 is: 131,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,620.72 : 318,970.32 = 87,971.44 : x
  2. Step 2: Convert to fraction form
    212,620.72/318,970.32 = 87,971.44/x
  3. Step 3: Cross multiply
    212,620.72x = 318,970.32 × 87,971.44
  4. Step 4: Simplify right side
    212,620.72x = 28,060,278,367.66
  5. Step 5: Solve for x
    x = 28,060,278,367.66/212,620.72
  6. Step 6: Final answer
    x = 131,973.40

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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.