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Finding the Fourth Proportional to 68,810.60, 103,216.05 and 18,891.38

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Solution

The fourth proportional to 68,810.60, 103,216.05 and 18,891.38 is: 28,337.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,810.60 : 103,216.05 = 18,891.38 : x
  2. Step 2: Convert to fraction form
    68,810.60/103,216.05 = 18,891.38/x
  3. Step 3: Cross multiply
    68,810.60x = 103,216.05 × 18,891.38
  4. Step 4: Simplify right side
    68,810.60x = 1,949,893,622.65
  5. Step 5: Solve for x
    x = 1,949,893,622.65/68,810.60
  6. Step 6: Final answer
    x = 28,337.11

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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.