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Finding the Fourth Proportional to 318,067.77, 477,101.35 and 81,410.07

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Solution

The fourth proportional to 318,067.77, 477,101.35 and 81,410.07 is: 122,115.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,067.77 : 477,101.35 = 81,410.07 : x
  2. Step 2: Convert to fraction form
    318,067.77/477,101.35 = 81,410.07/x
  3. Step 3: Cross multiply
    318,067.77x = 477,101.35 × 81,410.07
  4. Step 4: Simplify right side
    318,067.77x = 38,840,854,300.59
  5. Step 5: Solve for x
    x = 38,840,854,300.59/318,067.77
  6. Step 6: Final answer
    x = 122,115.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.