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Finding the Fourth Proportional to 87,680.70, 120,999.90 and 47,394.36

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Solution

The fourth proportional to 87,680.70, 120,999.90 and 47,394.36 is: 65,404.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,680.70 : 120,999.90 = 47,394.36 : x
  2. Step 2: Convert to fraction form
    87,680.70/120,999.90 = 47,394.36/x
  3. Step 3: Cross multiply
    87,680.70x = 120,999.90 × 47,394.36
  4. Step 4: Simplify right side
    87,680.70x = 5,734,712,820.56
  5. Step 5: Solve for x
    x = 5,734,712,820.56/87,680.70
  6. Step 6: Final answer
    x = 65,404.51

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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.