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Finding the Fourth Proportional to 251,878.20, 377,729.10 and 74,338.20

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Solution

The fourth proportional to 251,878.20, 377,729.10 and 74,338.20 is: 111,481.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,878.20 : 377,729.10 = 74,338.20 : x
  2. Step 2: Convert to fraction form
    251,878.20/377,729.10 = 74,338.20/x
  3. Step 3: Cross multiply
    251,878.20x = 377,729.10 × 74,338.20
  4. Step 4: Simplify right side
    251,878.20x = 28,079,701,381.62
  5. Step 5: Solve for x
    x = 28,079,701,381.62/251,878.20
  6. Step 6: Final answer
    x = 111,481.27

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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.