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Finding the Fourth Proportional to 212,618.26, 318,919.41 and 52,694.72

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Solution

The fourth proportional to 212,618.26, 318,919.41 and 52,694.72 is: 79,040.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,618.26 : 318,919.41 = 52,694.72 : x
  2. Step 2: Convert to fraction form
    212,618.26/318,919.41 = 52,694.72/x
  3. Step 3: Cross multiply
    212,618.26x = 318,919.41 × 52,694.72
  4. Step 4: Simplify right side
    212,618.26x = 16,805,369,012.52
  5. Step 5: Solve for x
    x = 16,805,369,012.52/212,618.26
  6. Step 6: Final answer
    x = 79,040.10

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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.