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Finding the Fourth Proportional to 215,464.80, 323,197.20 and 67,720.80

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Solution

The fourth proportional to 215,464.80, 323,197.20 and 67,720.80 is: 101,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,464.80 : 323,197.20 = 67,720.80 : x
  2. Step 2: Convert to fraction form
    215,464.80/323,197.20 = 67,720.80/x
  3. Step 3: Cross multiply
    215,464.80x = 323,197.20 × 67,720.80
  4. Step 4: Simplify right side
    215,464.80x = 21,887,172,941.76
  5. Step 5: Solve for x
    x = 21,887,172,941.76/215,464.80
  6. Step 6: Final answer
    x = 101,581.20

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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.