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Finding the Fourth Proportional to 251,241.21, 376,780.80 and 82,721.40

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Solution

The fourth proportional to 251,241.21, 376,780.80 and 82,721.40 is: 124,055.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,241.21 : 376,780.80 = 82,721.40 : x
  2. Step 2: Convert to fraction form
    251,241.21/376,780.80 = 82,721.40/x
  3. Step 3: Cross multiply
    251,241.21x = 376,780.80 × 82,721.40
  4. Step 4: Simplify right side
    251,241.21x = 31,167,835,269.12
  5. Step 5: Solve for x
    x = 31,167,835,269.12/251,241.21
  6. Step 6: Final answer
    x = 124,055.43

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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.