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Finding the Fourth Proportional to 41,361.60, 61,969.20 and 39,991.20

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Solution

The fourth proportional to 41,361.60, 61,969.20 and 39,991.20 is: 59,916.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,361.60 : 61,969.20 = 39,991.20 : x
  2. Step 2: Convert to fraction form
    41,361.60/61,969.20 = 39,991.20/x
  3. Step 3: Cross multiply
    41,361.60x = 61,969.20 × 39,991.20
  4. Step 4: Simplify right side
    41,361.60x = 2,478,222,671.04
  5. Step 5: Solve for x
    x = 2,478,222,671.04/41,361.60
  6. Step 6: Final answer
    x = 59,916.03

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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.