Home / 212,144.46-318,355.13-79,131.12

Finding the Fourth Proportional to 212,144.46, 318,355.13 and 79,131.12

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Solution

The fourth proportional to 212,144.46, 318,355.13 and 79,131.12 is: 118,748.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,144.46 : 318,355.13 = 79,131.12 : x
  2. Step 2: Convert to fraction form
    212,144.46/318,355.13 = 79,131.12/x
  3. Step 3: Cross multiply
    212,144.46x = 318,355.13 × 79,131.12
  4. Step 4: Simplify right side
    212,144.46x = 25,191,796,007.21
  5. Step 5: Solve for x
    x = 25,191,796,007.21/212,144.46
  6. Step 6: Final answer
    x = 118,748.31

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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.