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Finding the Fourth Proportional to 217,372.82, 299,970.65 and 121,879.22

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Solution

The fourth proportional to 217,372.82, 299,970.65 and 121,879.22 is: 168,191.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,372.82 : 299,970.65 = 121,879.22 : x
  2. Step 2: Convert to fraction form
    217,372.82/299,970.65 = 121,879.22/x
  3. Step 3: Cross multiply
    217,372.82x = 299,970.65 × 121,879.22
  4. Step 4: Simplify right side
    217,372.82x = 36,560,188,844.89
  5. Step 5: Solve for x
    x = 36,560,188,844.89/217,372.82
  6. Step 6: Final answer
    x = 168,191.17

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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.