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Finding the Fourth Proportional to 87,021.63, 120,028.41 and 74,067.80

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Solution

The fourth proportional to 87,021.63, 120,028.41 and 74,067.80 is: 102,161.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,021.63 : 120,028.41 = 74,067.80 : x
  2. Step 2: Convert to fraction form
    87,021.63/120,028.41 = 74,067.80/x
  3. Step 3: Cross multiply
    87,021.63x = 120,028.41 × 74,067.80
  4. Step 4: Simplify right side
    87,021.63x = 8,890,239,666.06
  5. Step 5: Solve for x
    x = 8,890,239,666.06/87,021.63
  6. Step 6: Final answer
    x = 102,161.26

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1.5x scale

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.