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Finding the Fourth Proportional to 212,676.60, 318,621.30 and 123,972.60

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Solution

The fourth proportional to 212,676.60, 318,621.30 and 123,972.60 is: 185,729.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,676.60 : 318,621.30 = 123,972.60 : x
  2. Step 2: Convert to fraction form
    212,676.60/318,621.30 = 123,972.60/x
  3. Step 3: Cross multiply
    212,676.60x = 318,621.30 × 123,972.60
  4. Step 4: Simplify right side
    212,676.60x = 39,500,310,976.38
  5. Step 5: Solve for x
    x = 39,500,310,976.38/212,676.60
  6. Step 6: Final answer
    x = 185,729.46

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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.