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Finding the Fourth Proportional to 135,440.50, 186,845.86 and 87,709.24

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Solution

The fourth proportional to 135,440.50, 186,845.86 and 87,709.24 is: 120,998.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,440.50 : 186,845.86 = 87,709.24 : x
  2. Step 2: Convert to fraction form
    135,440.50/186,845.86 = 87,709.24/x
  3. Step 3: Cross multiply
    135,440.50x = 186,845.86 × 87,709.24
  4. Step 4: Simplify right side
    135,440.50x = 16,388,108,377.75
  5. Step 5: Solve for x
    x = 16,388,108,377.75/135,440.50
  6. Step 6: Final answer
    x = 120,998.58

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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.