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Finding the Fourth Proportional to 217,903.80, 326,971.80 and 84,788.40

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Solution

The fourth proportional to 217,903.80, 326,971.80 and 84,788.40 is: 127,227.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,903.80 : 326,971.80 = 84,788.40 : x
  2. Step 2: Convert to fraction form
    217,903.80/326,971.80 = 84,788.40/x
  3. Step 3: Cross multiply
    217,903.80x = 326,971.80 × 84,788.40
  4. Step 4: Simplify right side
    217,903.80x = 27,723,415,767.12
  5. Step 5: Solve for x
    x = 27,723,415,767.12/217,903.80
  6. Step 6: Final answer
    x = 127,227.78

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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.