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Finding the Fourth Proportional to 68,980.64, 103,490.04 and 27,456.80

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Solution

The fourth proportional to 68,980.64, 103,490.04 and 27,456.80 is: 41,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,980.64 : 103,490.04 = 27,456.80 : x
  2. Step 2: Convert to fraction form
    68,980.64/103,490.04 = 27,456.80/x
  3. Step 3: Cross multiply
    68,980.64x = 103,490.04 × 27,456.80
  4. Step 4: Simplify right side
    68,980.64x = 2,841,505,330.27
  5. Step 5: Solve for x
    x = 2,841,505,330.27/68,980.64
  6. Step 6: Final answer
    x = 41,192.79

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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.