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Finding the Fourth Proportional to 71,737.38, 98,986.41 and 39,906.18

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Solution

The fourth proportional to 71,737.38, 98,986.41 and 39,906.18 is: 55,064.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,737.38 : 98,986.41 = 39,906.18 : x
  2. Step 2: Convert to fraction form
    71,737.38/98,986.41 = 39,906.18/x
  3. Step 3: Cross multiply
    71,737.38x = 98,986.41 × 39,906.18
  4. Step 4: Simplify right side
    71,737.38x = 3,950,169,495.01
  5. Step 5: Solve for x
    x = 3,950,169,495.01/71,737.38
  6. Step 6: Final answer
    x = 55,064.31

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1.5x scale

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.