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Finding the Fourth Proportional to 39,136.88, 54,008.92 and 21,231.89

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Solution

The fourth proportional to 39,136.88, 54,008.92 and 21,231.89 is: 29,300.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,136.88 : 54,008.92 = 21,231.89 : x
  2. Step 2: Convert to fraction form
    39,136.88/54,008.92 = 21,231.89/x
  3. Step 3: Cross multiply
    39,136.88x = 54,008.92 × 21,231.89
  4. Step 4: Simplify right side
    39,136.88x = 1,146,711,335.60
  5. Step 5: Solve for x
    x = 1,146,711,335.60/39,136.88
  6. Step 6: Final answer
    x = 29,300.02

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.