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Finding the Fourth Proportional to 217,447.16, 300,078.15 and 121,958.96

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Solution

The fourth proportional to 217,447.16, 300,078.15 and 121,958.96 is: 168,303.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,447.16 : 300,078.15 = 121,958.96 : x
  2. Step 2: Convert to fraction form
    217,447.16/300,078.15 = 121,958.96/x
  3. Step 3: Cross multiply
    217,447.16x = 300,078.15 × 121,958.96
  4. Step 4: Simplify right side
    217,447.16x = 36,597,219,092.72
  5. Step 5: Solve for x
    x = 36,597,219,092.72/217,447.16
  6. Step 6: Final answer
    x = 168,303.96

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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.