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Finding the Fourth Proportional to 87,874.20, 121,264.83 and 47,587.64

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Solution

The fourth proportional to 87,874.20, 121,264.83 and 47,587.64 is: 65,670.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,874.20 : 121,264.83 = 47,587.64 : x
  2. Step 2: Convert to fraction form
    87,874.20/121,264.83 = 47,587.64/x
  3. Step 3: Cross multiply
    87,874.20x = 121,264.83 × 47,587.64
  4. Step 4: Simplify right side
    87,874.20x = 5,770,706,468.38
  5. Step 5: Solve for x
    x = 5,770,706,468.38/87,874.20
  6. Step 6: Final answer
    x = 65,670.09

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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.