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Finding the Fourth Proportional to 71,890.80, 99,209.70 and 41,694.03

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Solution

The fourth proportional to 71,890.80, 99,209.70 and 41,694.03 is: 57,537.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,890.80 : 99,209.70 = 41,694.03 : x
  2. Step 2: Convert to fraction form
    71,890.80/99,209.70 = 41,694.03/x
  3. Step 3: Cross multiply
    71,890.80x = 99,209.70 × 41,694.03
  4. Step 4: Simplify right side
    71,890.80x = 4,136,452,100.25
  5. Step 5: Solve for x
    x = 4,136,452,100.25/71,890.80
  6. Step 6: Final answer
    x = 57,537.99

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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.