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Finding the Fourth Proportional to 72,939.12, 109,408.44 and 23,691.12

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Solution

The fourth proportional to 72,939.12, 109,408.44 and 23,691.12 is: 35,536.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.12 : 109,408.44 = 23,691.12 : x
  2. Step 2: Convert to fraction form
    72,939.12/109,408.44 = 23,691.12/x
  3. Step 3: Cross multiply
    72,939.12x = 109,408.44 × 23,691.12
  4. Step 4: Simplify right side
    72,939.12x = 2,592,008,481.05
  5. Step 5: Solve for x
    x = 2,592,008,481.05/72,939.12
  6. Step 6: Final answer
    x = 35,536.60

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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.