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Finding the Fourth Proportional to 68,399.56, 102,574.78 and 28,959.48

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Solution

The fourth proportional to 68,399.56, 102,574.78 and 28,959.48 is: 43,428.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,399.56 : 102,574.78 = 28,959.48 : x
  2. Step 2: Convert to fraction form
    68,399.56/102,574.78 = 28,959.48/x
  3. Step 3: Cross multiply
    68,399.56x = 102,574.78 × 28,959.48
  4. Step 4: Simplify right side
    68,399.56x = 2,970,512,289.91
  5. Step 5: Solve for x
    x = 2,970,512,289.91/68,399.56
  6. Step 6: Final answer
    x = 43,428.82

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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.