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Finding the Fourth Proportional to 85,912.75, 118,553.90 and 47,669.87

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Solution

The fourth proportional to 85,912.75, 118,553.90 and 47,669.87 is: 65,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,912.75 : 118,553.90 = 47,669.87 : x
  2. Step 2: Convert to fraction form
    85,912.75/118,553.90 = 47,669.87/x
  3. Step 3: Cross multiply
    85,912.75x = 118,553.90 × 47,669.87
  4. Step 4: Simplify right side
    85,912.75x = 5,651,448,762.64
  5. Step 5: Solve for x
    x = 5,651,448,762.64/85,912.75
  6. Step 6: Final answer
    x = 65,781.26

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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.