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Finding the Fourth Proportional to 217,918.60, 326,877.90 and 77,626.60

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Solution

The fourth proportional to 217,918.60, 326,877.90 and 77,626.60 is: 116,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,918.60 : 326,877.90 = 77,626.60 : x
  2. Step 2: Convert to fraction form
    217,918.60/326,877.90 = 77,626.60/x
  3. Step 3: Cross multiply
    217,918.60x = 326,877.90 × 77,626.60
  4. Step 4: Simplify right side
    217,918.60x = 25,374,419,992.14
  5. Step 5: Solve for x
    x = 25,374,419,992.14/217,918.60
  6. Step 6: Final answer
    x = 116,439.90

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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.