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Finding the Fourth Proportional to 72,721.71, 109,093.50 and 22,790.70

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Solution

The fourth proportional to 72,721.71, 109,093.50 and 22,790.70 is: 34,189.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.71 : 109,093.50 = 22,790.70 : x
  2. Step 2: Convert to fraction form
    72,721.71/109,093.50 = 22,790.70/x
  3. Step 3: Cross multiply
    72,721.71x = 109,093.50 × 22,790.70
  4. Step 4: Simplify right side
    72,721.71x = 2,486,317,230.45
  5. Step 5: Solve for x
    x = 2,486,317,230.45/72,721.71
  6. Step 6: Final answer
    x = 34,189.48

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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.