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Finding the Fourth Proportional to 251,390.70, 376,976.70 and 82,845.90

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Solution

The fourth proportional to 251,390.70, 376,976.70 and 82,845.90 is: 124,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,390.70 : 376,976.70 = 82,845.90 : x
  2. Step 2: Convert to fraction form
    251,390.70/376,976.70 = 82,845.90/x
  3. Step 3: Cross multiply
    251,390.70x = 376,976.70 × 82,845.90
  4. Step 4: Simplify right side
    251,390.70x = 31,230,973,990.53
  5. Step 5: Solve for x
    x = 31,230,973,990.53/251,390.70
  6. Step 6: Final answer
    x = 124,232.81

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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.