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Finding the Fourth Proportional to 215,965.20, 323,710.20 and 75,651.60

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Solution

The fourth proportional to 215,965.20, 323,710.20 and 75,651.60 is: 113,394.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,965.20 : 323,710.20 = 75,651.60 : x
  2. Step 2: Convert to fraction form
    215,965.20/323,710.20 = 75,651.60/x
  3. Step 3: Cross multiply
    215,965.20x = 323,710.20 × 75,651.60
  4. Step 4: Simplify right side
    215,965.20x = 24,489,194,566.32
  5. Step 5: Solve for x
    x = 24,489,194,566.32/215,965.20
  6. Step 6: Final answer
    x = 113,394.17

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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.