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Finding the Fourth Proportional to 81,081.52, 111,911.16 and 47,558.32

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Solution

The fourth proportional to 81,081.52, 111,911.16 and 47,558.32 is: 65,641.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.52 : 111,911.16 = 47,558.32 : x
  2. Step 2: Convert to fraction form
    81,081.52/111,911.16 = 47,558.32/x
  3. Step 3: Cross multiply
    81,081.52x = 111,911.16 × 47,558.32
  4. Step 4: Simplify right side
    81,081.52x = 5,322,306,758.85
  5. Step 5: Solve for x
    x = 5,322,306,758.85/81,081.52
  6. Step 6: Final answer
    x = 65,641.43

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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.