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Finding the Fourth Proportional to 82,342.80, 123,629.40 and 51,238.80

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Solution

The fourth proportional to 82,342.80, 123,629.40 and 51,238.80 is: 76,929.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,342.80 : 123,629.40 = 51,238.80 : x
  2. Step 2: Convert to fraction form
    82,342.80/123,629.40 = 51,238.80/x
  3. Step 3: Cross multiply
    82,342.80x = 123,629.40 × 51,238.80
  4. Step 4: Simplify right side
    82,342.80x = 6,334,622,100.72
  5. Step 5: Solve for x
    x = 6,334,622,100.72/82,342.80
  6. Step 6: Final answer
    x = 76,929.88

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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.