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Finding the Fourth Proportional to 212,168.52, 318,229 and 54,400.68

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Solution

The fourth proportional to 212,168.52, 318,229 and 54,400.68 is: 81,594.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,168.52 : 318,229 = 54,400.68 : x
  2. Step 2: Convert to fraction form
    212,168.52/318,229 = 54,400.68/x
  3. Step 3: Cross multiply
    212,168.52x = 318,229 × 54,400.68
  4. Step 4: Simplify right side
    212,168.52x = 17,311,873,995.72
  5. Step 5: Solve for x
    x = 17,311,873,995.72/212,168.52
  6. Step 6: Final answer
    x = 81,594.92

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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.