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Finding the Fourth Proportional to 68,731.30, 103,136.58 and 37,141.42

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Solution

The fourth proportional to 68,731.30, 103,136.58 and 37,141.42 is: 55,733.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,731.30 : 103,136.58 = 37,141.42 : x
  2. Step 2: Convert to fraction form
    68,731.30/103,136.58 = 37,141.42/x
  3. Step 3: Cross multiply
    68,731.30x = 103,136.58 × 37,141.42
  4. Step 4: Simplify right side
    68,731.30x = 3,830,639,035.14
  5. Step 5: Solve for x
    x = 3,830,639,035.14/68,731.30
  6. Step 6: Final answer
    x = 55,733.55

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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.