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Finding the Fourth Proportional to 251,239.95, 376,778.93 and 82,720.15

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Solution

The fourth proportional to 251,239.95, 376,778.93 and 82,720.15 is: 124,053.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,239.95 : 376,778.93 = 82,720.15 : x
  2. Step 2: Convert to fraction form
    251,239.95/376,778.93 = 82,720.15/x
  3. Step 3: Cross multiply
    251,239.95x = 376,778.93 × 82,720.15
  4. Step 4: Simplify right side
    251,239.95x = 31,167,209,606.44
  5. Step 5: Solve for x
    x = 31,167,209,606.44/251,239.95
  6. Step 6: Final answer
    x = 124,053.56

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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.