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Finding the Fourth Proportional to 87,876.87, 121,270.20 and 47,590.71

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Solution

The fourth proportional to 87,876.87, 121,270.20 and 47,590.71 is: 65,675.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,876.87 : 121,270.20 = 47,590.71 : x
  2. Step 2: Convert to fraction form
    87,876.87/121,270.20 = 47,590.71/x
  3. Step 3: Cross multiply
    87,876.87x = 121,270.20 × 47,590.71
  4. Step 4: Simplify right side
    87,876.87x = 5,771,334,919.84
  5. Step 5: Solve for x
    x = 5,771,334,919.84/87,876.87
  6. Step 6: Final answer
    x = 65,675.24

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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.