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Finding the Fourth Proportional to 87,360, 120,556.80 and 47,618.56

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Solution

The fourth proportional to 87,360, 120,556.80 and 47,618.56 is: 65,713.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,360 : 120,556.80 = 47,618.56 : x
  2. Step 2: Convert to fraction form
    87,360/120,556.80 = 47,618.56/x
  3. Step 3: Cross multiply
    87,360x = 120,556.80 × 47,618.56
  4. Step 4: Simplify right side
    87,360x = 5,740,741,214.21
  5. Step 5: Solve for x
    x = 5,740,741,214.21/87,360
  6. Step 6: Final answer
    x = 65,713.61

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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.