Home / 217,550.22-326,286.40-138,429.42

Finding the Fourth Proportional to 217,550.22, 326,286.40 and 138,429.42

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Solution

The fourth proportional to 217,550.22, 326,286.40 and 138,429.42 is: 207,619.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,550.22 : 326,286.40 = 138,429.42 : x
  2. Step 2: Convert to fraction form
    217,550.22/326,286.40 = 138,429.42/x
  3. Step 3: Cross multiply
    217,550.22x = 326,286.40 × 138,429.42
  4. Step 4: Simplify right side
    217,550.22x = 45,167,637,105.89
  5. Step 5: Solve for x
    x = 45,167,637,105.89/217,550.22
  6. Step 6: Final answer
    x = 207,619.36

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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.