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Finding the Fourth Proportional to 217,500.60, 300,135.48 and 120,709.68

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Solution

The fourth proportional to 217,500.60, 300,135.48 and 120,709.68 is: 166,570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,500.60 : 300,135.48 = 120,709.68 : x
  2. Step 2: Convert to fraction form
    217,500.60/300,135.48 = 120,709.68/x
  3. Step 3: Cross multiply
    217,500.60x = 300,135.48 × 120,709.68
  4. Step 4: Simplify right side
    217,500.60x = 36,229,257,747.45
  5. Step 5: Solve for x
    x = 36,229,257,747.45/217,500.60
  6. Step 6: Final answer
    x = 166,570.84

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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.