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Finding the Fourth Proportional to 87,676.70, 120,994.38 and 47,390.36

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Solution

The fourth proportional to 87,676.70, 120,994.38 and 47,390.36 is: 65,398.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,676.70 : 120,994.38 = 47,390.36 : x
  2. Step 2: Convert to fraction form
    87,676.70/120,994.38 = 47,390.36/x
  3. Step 3: Cross multiply
    87,676.70x = 120,994.38 × 47,390.36
  4. Step 4: Simplify right side
    87,676.70x = 5,733,967,226.18
  5. Step 5: Solve for x
    x = 5,733,967,226.18/87,676.70
  6. Step 6: Final answer
    x = 65,398.99

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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.