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Finding the Fourth Proportional to 71,843.87, 99,147.60 and 40,012.77

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Solution

The fourth proportional to 71,843.87, 99,147.60 and 40,012.77 is: 55,219.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,843.87 : 99,147.60 = 40,012.77 : x
  2. Step 2: Convert to fraction form
    71,843.87/99,147.60 = 40,012.77/x
  3. Step 3: Cross multiply
    71,843.87x = 99,147.60 × 40,012.77
  4. Step 4: Simplify right side
    71,843.87x = 3,967,169,619.11
  5. Step 5: Solve for x
    x = 3,967,169,619.11/71,843.87
  6. Step 6: Final answer
    x = 55,219.32

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1.5x scale

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.