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Finding the Fourth Proportional to 72,676.47, 109,002.38 and 20,086.11

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Solution

The fourth proportional to 72,676.47, 109,002.38 and 20,086.11 is: 30,125.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,676.47 : 109,002.38 = 20,086.11 : x
  2. Step 2: Convert to fraction form
    72,676.47/109,002.38 = 20,086.11/x
  3. Step 3: Cross multiply
    72,676.47x = 109,002.38 × 20,086.11
  4. Step 4: Simplify right side
    72,676.47x = 2,189,433,694.51
  5. Step 5: Solve for x
    x = 2,189,433,694.51/72,676.47
  6. Step 6: Final answer
    x = 30,125.76

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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.