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Finding the Fourth Proportional to 84,150, 126,039.60 and 69,558.66

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Solution

The fourth proportional to 84,150, 126,039.60 and 69,558.66 is: 104,184.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,150 : 126,039.60 = 69,558.66 : x
  2. Step 2: Convert to fraction form
    84,150/126,039.60 = 69,558.66/x
  3. Step 3: Cross multiply
    84,150x = 126,039.60 × 69,558.66
  4. Step 4: Simplify right side
    84,150x = 8,767,145,682.94
  5. Step 5: Solve for x
    x = 8,767,145,682.94/84,150
  6. Step 6: Final answer
    x = 104,184.74

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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.