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Finding the Fourth Proportional to 71,786.88, 99,064.13 and 39,521.23

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Solution

The fourth proportional to 71,786.88, 99,064.13 and 39,521.23 is: 54,538.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,786.88 : 99,064.13 = 39,521.23 : x
  2. Step 2: Convert to fraction form
    71,786.88/99,064.13 = 39,521.23/x
  3. Step 3: Cross multiply
    71,786.88x = 99,064.13 × 39,521.23
  4. Step 4: Simplify right side
    71,786.88x = 3,915,136,266.48
  5. Step 5: Solve for x
    x = 3,915,136,266.48/71,786.88
  6. Step 6: Final answer
    x = 54,538.33

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Why These Related Problems?

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