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Finding the Fourth Proportional to 79,879.53, 110,131.44 and 65,487.24

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Solution

The fourth proportional to 79,879.53, 110,131.44 and 65,487.24 is: 90,288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,879.53 : 110,131.44 = 65,487.24 : x
  2. Step 2: Convert to fraction form
    79,879.53/110,131.44 = 65,487.24/x
  3. Step 3: Cross multiply
    79,879.53x = 110,131.44 × 65,487.24
  4. Step 4: Simplify right side
    79,879.53x = 7,212,204,042.83
  5. Step 5: Solve for x
    x = 7,212,204,042.83/79,879.53
  6. Step 6: Final answer
    x = 90,288.51

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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.