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Finding the Fourth Proportional to 71,949.92, 99,290.44 and 40,119.20

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Solution

The fourth proportional to 71,949.92, 99,290.44 and 40,119.20 is: 55,364.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,949.92 : 99,290.44 = 40,119.20 : x
  2. Step 2: Convert to fraction form
    71,949.92/99,290.44 = 40,119.20/x
  3. Step 3: Cross multiply
    71,949.92x = 99,290.44 × 40,119.20
  4. Step 4: Simplify right side
    71,949.92x = 3,983,453,020.45
  5. Step 5: Solve for x
    x = 3,983,453,020.45/71,949.92
  6. Step 6: Final answer
    x = 55,364.25

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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.