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Finding the Fourth Proportional to 135,469.50, 186,950.69 and 81,077.91

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Solution

The fourth proportional to 135,469.50, 186,950.69 and 81,077.91 is: 111,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,469.50 : 186,950.69 = 81,077.91 : x
  2. Step 2: Convert to fraction form
    135,469.50/186,950.69 = 81,077.91/x
  3. Step 3: Cross multiply
    135,469.50x = 186,950.69 × 81,077.91
  4. Step 4: Simplify right side
    135,469.50x = 15,157,571,218.26
  5. Step 5: Solve for x
    x = 15,157,571,218.26/135,469.50
  6. Step 6: Final answer
    x = 111,889.18

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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.