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Finding the Fourth Proportional to 68,569, 102,814.62 and 28,541.80

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Solution

The fourth proportional to 68,569, 102,814.62 and 28,541.80 is: 42,796.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,569 : 102,814.62 = 28,541.80 : x
  2. Step 2: Convert to fraction form
    68,569/102,814.62 = 28,541.80/x
  3. Step 3: Cross multiply
    68,569x = 102,814.62 × 28,541.80
  4. Step 4: Simplify right side
    68,569x = 2,934,514,321.12
  5. Step 5: Solve for x
    x = 2,934,514,321.12/68,569
  6. Step 6: Final answer
    x = 42,796.52

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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.