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Finding the Fourth Proportional to 84,150.21, 126,039.87 and 69,558.87

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Solution

The fourth proportional to 84,150.21, 126,039.87 and 69,558.87 is: 104,185.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,150.21 : 126,039.87 = 69,558.87 : x
  2. Step 2: Convert to fraction form
    84,150.21/126,039.87 = 69,558.87/x
  3. Step 3: Cross multiply
    84,150.21x = 126,039.87 × 69,558.87
  4. Step 4: Simplify right side
    84,150.21x = 8,767,190,932.15
  5. Step 5: Solve for x
    x = 8,767,190,932.15/84,150.21
  6. Step 6: Final answer
    x = 104,185.02

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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.