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Finding the Fourth Proportional to 71,900.92, 99,223.41 and 40,069.18

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Solution

The fourth proportional to 71,900.92, 99,223.41 and 40,069.18 is: 55,295.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,900.92 : 99,223.41 = 40,069.18 : x
  2. Step 2: Convert to fraction form
    71,900.92/99,223.41 = 40,069.18/x
  3. Step 3: Cross multiply
    71,900.92x = 99,223.41 × 40,069.18
  4. Step 4: Simplify right side
    71,900.92x = 3,975,800,675.50
  5. Step 5: Solve for x
    x = 3,975,800,675.50/71,900.92
  6. Step 6: Final answer
    x = 55,295.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.