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Finding the Fourth Proportional to 212,573.42, 318,749.42 and 79,344.12

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Solution

The fourth proportional to 212,573.42, 318,749.42 and 79,344.12 is: 118,974.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,573.42 : 318,749.42 = 79,344.12 : x
  2. Step 2: Convert to fraction form
    212,573.42/318,749.42 = 79,344.12/x
  3. Step 3: Cross multiply
    212,573.42x = 318,749.42 × 79,344.12
  4. Step 4: Simplify right side
    212,573.42x = 25,290,892,230.41
  5. Step 5: Solve for x
    x = 25,290,892,230.41/212,573.42
  6. Step 6: Final answer
    x = 118,974.86

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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.