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Finding the Fourth Proportional to 73,005.82, 109,508.73 and 20,415.31

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Solution

The fourth proportional to 73,005.82, 109,508.73 and 20,415.31 is: 30,622.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,005.82 : 109,508.73 = 20,415.31 : x
  2. Step 2: Convert to fraction form
    73,005.82/109,508.73 = 20,415.31/x
  3. Step 3: Cross multiply
    73,005.82x = 109,508.73 × 20,415.31
  4. Step 4: Simplify right side
    73,005.82x = 2,235,654,396.88
  5. Step 5: Solve for x
    x = 2,235,654,396.88/73,005.82
  6. Step 6: Final answer
    x = 30,622.96

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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.