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Finding the Fourth Proportional to 45,690.82, 68,527.86 and 20,724.86

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Solution

The fourth proportional to 45,690.82, 68,527.86 and 20,724.86 is: 31,083.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,690.82 : 68,527.86 = 20,724.86 : x
  2. Step 2: Convert to fraction form
    45,690.82/68,527.86 = 20,724.86/x
  3. Step 3: Cross multiply
    45,690.82x = 68,527.86 × 20,724.86
  4. Step 4: Simplify right side
    45,690.82x = 1,420,230,398.20
  5. Step 5: Solve for x
    x = 1,420,230,398.20/45,690.82
  6. Step 6: Final answer
    x = 31,083.50

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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.