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Finding the Fourth Proportional to 68,979.64, 103,488.54 and 27,455.80

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Solution

The fourth proportional to 68,979.64, 103,488.54 and 27,455.80 is: 41,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,979.64 : 103,488.54 = 27,455.80 : x
  2. Step 2: Convert to fraction form
    68,979.64/103,488.54 = 27,455.80/x
  3. Step 3: Cross multiply
    68,979.64x = 103,488.54 × 27,455.80
  4. Step 4: Simplify right side
    68,979.64x = 2,841,360,656.53
  5. Step 5: Solve for x
    x = 2,841,360,656.53/68,979.64
  6. Step 6: Final answer
    x = 41,191.29

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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.