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Finding the Fourth Proportional to 90,641.44, 125,118.88 and 77,843.24

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Solution

The fourth proportional to 90,641.44, 125,118.88 and 77,843.24 is: 107,452.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,641.44 : 125,118.88 = 77,843.24 : x
  2. Step 2: Convert to fraction form
    90,641.44/125,118.88 = 77,843.24/x
  3. Step 3: Cross multiply
    90,641.44x = 125,118.88 × 77,843.24
  4. Step 4: Simplify right side
    90,641.44x = 9,739,659,004.37
  5. Step 5: Solve for x
    x = 9,739,659,004.37/90,641.44
  6. Step 6: Final answer
    x = 107,452.61

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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.