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Finding the Fourth Proportional to 84,661.99, 126,976.57 and 80,447.15

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Solution

The fourth proportional to 84,661.99, 126,976.57 and 80,447.15 is: 120,655.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,661.99 : 126,976.57 = 80,447.15 : x
  2. Step 2: Convert to fraction form
    84,661.99/126,976.57 = 80,447.15/x
  3. Step 3: Cross multiply
    84,661.99x = 126,976.57 × 80,447.15
  4. Step 4: Simplify right side
    84,661.99x = 10,214,903,173.28
  5. Step 5: Solve for x
    x = 10,214,903,173.28/84,661.99
  6. Step 6: Final answer
    x = 120,655.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.