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Finding the Fourth Proportional to 72,708.69, 109,064.39 and 22,787.68

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Solution

The fourth proportional to 72,708.69, 109,064.39 and 22,787.68 is: 34,181.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,708.69 : 109,064.39 = 22,787.68 : x
  2. Step 2: Convert to fraction form
    72,708.69/109,064.39 = 22,787.68/x
  3. Step 3: Cross multiply
    72,708.69x = 109,064.39 × 22,787.68
  4. Step 4: Simplify right side
    72,708.69x = 2,485,324,154.18
  5. Step 5: Solve for x
    x = 2,485,324,154.18/72,708.69
  6. Step 6: Final answer
    x = 34,181.94

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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.