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Finding the Fourth Proportional to 318,240.78, 477,325.53 and 81,589.02

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Solution

The fourth proportional to 318,240.78, 477,325.53 and 81,589.02 is: 122,374.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,240.78 : 477,325.53 = 81,589.02 : x
  2. Step 2: Convert to fraction form
    318,240.78/477,325.53 = 81,589.02/x
  3. Step 3: Cross multiply
    318,240.78x = 477,325.53 × 81,589.02
  4. Step 4: Simplify right side
    318,240.78x = 38,944,522,213.68
  5. Step 5: Solve for x
    x = 38,944,522,213.68/318,240.78
  6. Step 6: Final answer
    x = 122,374.39

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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.