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Finding the Fourth Proportional to 69,078.90, 103,673.03 and 26,979.15

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Solution

The fourth proportional to 69,078.90, 103,673.03 and 26,979.15 is: 40,490.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,078.90 : 103,673.03 = 26,979.15 : x
  2. Step 2: Convert to fraction form
    69,078.90/103,673.03 = 26,979.15/x
  3. Step 3: Cross multiply
    69,078.90x = 103,673.03 × 26,979.15
  4. Step 4: Simplify right side
    69,078.90x = 2,797,010,227.32
  5. Step 5: Solve for x
    x = 2,797,010,227.32/69,078.90
  6. Step 6: Final answer
    x = 40,490.08

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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.