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Finding the Fourth Proportional to 318,241.53, 477,326.66 and 81,589.77

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Solution

The fourth proportional to 318,241.53, 477,326.66 and 81,589.77 is: 122,375.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,241.53 : 477,326.66 = 81,589.77 : x
  2. Step 2: Convert to fraction form
    318,241.53/477,326.66 = 81,589.77/x
  3. Step 3: Cross multiply
    318,241.53x = 477,326.66 × 81,589.77
  4. Step 4: Simplify right side
    318,241.53x = 38,944,971,996.32
  5. Step 5: Solve for x
    x = 38,944,971,996.32/318,241.53
  6. Step 6: Final answer
    x = 122,375.52

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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.