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Finding the Fourth Proportional to 217,553.12, 300,218.60 and 120,751.29

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Solution

The fourth proportional to 217,553.12, 300,218.60 and 120,751.29 is: 166,634.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,553.12 : 300,218.60 = 120,751.29 : x
  2. Step 2: Convert to fraction form
    217,553.12/300,218.60 = 120,751.29/x
  3. Step 3: Cross multiply
    217,553.12x = 300,218.60 × 120,751.29
  4. Step 4: Simplify right side
    217,553.12x = 36,251,784,800.42
  5. Step 5: Solve for x
    x = 36,251,784,800.42/217,553.12
  6. Step 6: Final answer
    x = 166,634.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.