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Finding the Fourth Proportional to 72,765.26, 109,147.90 and 20,174.75

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Solution

The fourth proportional to 72,765.26, 109,147.90 and 20,174.75 is: 30,262.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,765.26 : 109,147.90 = 20,174.75 : x
  2. Step 2: Convert to fraction form
    72,765.26/109,147.90 = 20,174.75/x
  3. Step 3: Cross multiply
    72,765.26x = 109,147.90 × 20,174.75
  4. Step 4: Simplify right side
    72,765.26x = 2,202,031,272.22
  5. Step 5: Solve for x
    x = 2,202,031,272.22/72,765.26
  6. Step 6: Final answer
    x = 30,262.12

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1.5x scale

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.