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Finding the Fourth Proportional to 201,321.90, 302,020.92 and 66,393.72

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Solution

The fourth proportional to 201,321.90, 302,020.92 and 66,393.72 is: 99,603.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,321.90 : 302,020.92 = 66,393.72 : x
  2. Step 2: Convert to fraction form
    201,321.90/302,020.92 = 66,393.72/x
  3. Step 3: Cross multiply
    201,321.90x = 302,020.92 × 66,393.72
  4. Step 4: Simplify right side
    201,321.90x = 20,052,292,396.62
  5. Step 5: Solve for x
    x = 20,052,292,396.62/201,321.90
  6. Step 6: Final answer
    x = 99,603.14

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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.