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Finding the Fourth Proportional to 89,648.62, 134,702.43 and 67,669

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Solution

The fourth proportional to 89,648.62, 134,702.43 and 67,669 is: 101,676.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,648.62 : 134,702.43 = 67,669 : x
  2. Step 2: Convert to fraction form
    89,648.62/134,702.43 = 67,669/x
  3. Step 3: Cross multiply
    89,648.62x = 134,702.43 × 67,669
  4. Step 4: Simplify right side
    89,648.62x = 9,115,178,735.67
  5. Step 5: Solve for x
    x = 9,115,178,735.67/89,648.62
  6. Step 6: Final answer
    x = 101,676.73

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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.