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Finding the Fourth Proportional to 212,320.92, 318,481.62 and 54,550.68

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Solution

The fourth proportional to 212,320.92, 318,481.62 and 54,550.68 is: 81,826.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,320.92 : 318,481.62 = 54,550.68 : x
  2. Step 2: Convert to fraction form
    212,320.92/318,481.62 = 54,550.68/x
  3. Step 3: Cross multiply
    212,320.92x = 318,481.62 × 54,550.68
  4. Step 4: Simplify right side
    212,320.92x = 17,373,388,938.50
  5. Step 5: Solve for x
    x = 17,373,388,938.50/212,320.92
  6. Step 6: Final answer
    x = 81,826.08

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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.