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Finding the Fourth Proportional to 81,771.80, 112,843.74 and 45,471.80

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Solution

The fourth proportional to 81,771.80, 112,843.74 and 45,471.80 is: 62,750.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,771.80 : 112,843.74 = 45,471.80 : x
  2. Step 2: Convert to fraction form
    81,771.80/112,843.74 = 45,471.80/x
  3. Step 3: Cross multiply
    81,771.80x = 112,843.74 × 45,471.80
  4. Step 4: Simplify right side
    81,771.80x = 5,131,207,976.53
  5. Step 5: Solve for x
    x = 5,131,207,976.53/81,771.80
  6. Step 6: Final answer
    x = 62,750.34

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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.