Home / 87,689.70-131,548.34-28,511.53

Finding the Fourth Proportional to 87,689.70, 131,548.34 and 28,511.53

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Solution

The fourth proportional to 87,689.70, 131,548.34 and 28,511.53 is: 42,771.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.70 : 131,548.34 = 28,511.53 : x
  2. Step 2: Convert to fraction form
    87,689.70/131,548.34 = 28,511.53/x
  3. Step 3: Cross multiply
    87,689.70x = 131,548.34 × 28,511.53
  4. Step 4: Simplify right side
    87,689.70x = 3,750,644,442.36
  5. Step 5: Solve for x
    x = 3,750,644,442.36/87,689.70
  6. Step 6: Final answer
    x = 42,771.78

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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.