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Finding the Fourth Proportional to 84,099.66, 126,208.62 and 76,059.96

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Solution

The fourth proportional to 84,099.66, 126,208.62 and 76,059.96 is: 114,143.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,099.66 : 126,208.62 = 76,059.96 : x
  2. Step 2: Convert to fraction form
    84,099.66/126,208.62 = 76,059.96/x
  3. Step 3: Cross multiply
    84,099.66x = 126,208.62 × 76,059.96
  4. Step 4: Simplify right side
    84,099.66x = 9,599,422,588.86
  5. Step 5: Solve for x
    x = 9,599,422,588.86/84,099.66
  6. Step 6: Final answer
    x = 114,143.42

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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.