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Finding the Fourth Proportional to 71,726.94, 107,590.41 and 19,136.61

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Solution

The fourth proportional to 71,726.94, 107,590.41 and 19,136.61 is: 28,704.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,726.94 : 107,590.41 = 19,136.61 : x
  2. Step 2: Convert to fraction form
    71,726.94/107,590.41 = 19,136.61/x
  3. Step 3: Cross multiply
    71,726.94x = 107,590.41 × 19,136.61
  4. Step 4: Simplify right side
    71,726.94x = 2,058,915,715.91
  5. Step 5: Solve for x
    x = 2,058,915,715.91/71,726.94
  6. Step 6: Final answer
    x = 28,704.92

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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.