Home / 87,485.67-131,249.30-28,321.31

Finding the Fourth Proportional to 87,485.67, 131,249.30 and 28,321.31

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Solution

The fourth proportional to 87,485.67, 131,249.30 and 28,321.31 is: 42,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,485.67 : 131,249.30 = 28,321.31 : x
  2. Step 2: Convert to fraction form
    87,485.67/131,249.30 = 28,321.31/x
  3. Step 3: Cross multiply
    87,485.67x = 131,249.30 × 28,321.31
  4. Step 4: Simplify right side
    87,485.67x = 3,717,152,299.10
  5. Step 5: Solve for x
    x = 3,717,152,299.10/87,485.67
  6. Step 6: Final answer
    x = 42,488.70

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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.