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Finding the Fourth Proportional to 159,137.85, 219,605.88 and 87,517.89

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Solution

The fourth proportional to 159,137.85, 219,605.88 and 87,517.89 is: 120,772.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,137.85 : 219,605.88 = 87,517.89 : x
  2. Step 2: Convert to fraction form
    159,137.85/219,605.88 = 87,517.89/x
  3. Step 3: Cross multiply
    159,137.85x = 219,605.88 × 87,517.89
  4. Step 4: Simplify right side
    159,137.85x = 19,219,443,249.19
  5. Step 5: Solve for x
    x = 19,219,443,249.19/159,137.85
  6. Step 6: Final answer
    x = 120,772.29

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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.