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Finding the Fourth Proportional to 71,890.78, 99,209.67 and 41,694.00

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Solution

The fourth proportional to 71,890.78, 99,209.67 and 41,694.00 is: 57,537.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,890.78 : 99,209.67 = 41,694.00 : x
  2. Step 2: Convert to fraction form
    71,890.78/99,209.67 = 41,694.00/x
  3. Step 3: Cross multiply
    71,890.78x = 99,209.67 × 41,694.00
  4. Step 4: Simplify right side
    71,890.78x = 4,136,448,020.53
  5. Step 5: Solve for x
    x = 4,136,448,020.53/71,890.78
  6. Step 6: Final answer
    x = 57,537.95

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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.