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Finding the Fourth Proportional to 68,980.93, 103,475.80 and 18,379.12

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Solution

The fourth proportional to 68,980.93, 103,475.80 and 18,379.12 is: 27,569.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,980.93 : 103,475.80 = 18,379.12 : x
  2. Step 2: Convert to fraction form
    68,980.93/103,475.80 = 18,379.12/x
  3. Step 3: Cross multiply
    68,980.93x = 103,475.80 × 18,379.12
  4. Step 4: Simplify right side
    68,980.93x = 1,901,794,145.30
  5. Step 5: Solve for x
    x = 1,901,794,145.30/68,980.93
  6. Step 6: Final answer
    x = 27,569.85

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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.