Home / 212,112.12-318,084.80-77,144.15

Finding the Fourth Proportional to 212,112.12, 318,084.80 and 77,144.15

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Solution

The fourth proportional to 212,112.12, 318,084.80 and 77,144.15 is: 115,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,112.12 : 318,084.80 = 77,144.15 : x
  2. Step 2: Convert to fraction form
    212,112.12/318,084.80 = 77,144.15/x
  3. Step 3: Cross multiply
    212,112.12x = 318,084.80 × 77,144.15
  4. Step 4: Simplify right side
    212,112.12x = 24,538,380,361.15
  5. Step 5: Solve for x
    x = 24,538,380,361.15/212,112.12
  6. Step 6: Final answer
    x = 115,685.90

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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.