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Finding the Fourth Proportional to 68,694.40, 102,889.37 and 52,782.31

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Solution

The fourth proportional to 68,694.40, 102,889.37 and 52,782.31 is: 79,056.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,694.40 : 102,889.37 = 52,782.31 : x
  2. Step 2: Convert to fraction form
    68,694.40/102,889.37 = 52,782.31/x
  3. Step 3: Cross multiply
    68,694.40x = 102,889.37 × 52,782.31
  4. Step 4: Simplify right side
    68,694.40x = 5,430,738,101.91
  5. Step 5: Solve for x
    x = 5,430,738,101.91/68,694.40
  6. Step 6: Final answer
    x = 79,056.49

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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.