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Finding the Fourth Proportional to 217,603.80, 326,401.38 and 143,193.96

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Solution

The fourth proportional to 217,603.80, 326,401.38 and 143,193.96 is: 214,788.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,603.80 : 326,401.38 = 143,193.96 : x
  2. Step 2: Convert to fraction form
    217,603.80/326,401.38 = 143,193.96/x
  3. Step 3: Cross multiply
    217,603.80x = 326,401.38 × 143,193.96
  4. Step 4: Simplify right side
    217,603.80x = 46,738,706,151.66
  5. Step 5: Solve for x
    x = 46,738,706,151.66/217,603.80
  6. Step 6: Final answer
    x = 214,788.10

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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.