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Finding the Fourth Proportional to 79,172.50, 109,253.88 and 43,361.75

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Solution

The fourth proportional to 79,172.50, 109,253.88 and 43,361.75 is: 59,836.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.50 : 109,253.88 = 43,361.75 : x
  2. Step 2: Convert to fraction form
    79,172.50/109,253.88 = 43,361.75/x
  3. Step 3: Cross multiply
    79,172.50x = 109,253.88 × 43,361.75
  4. Step 4: Simplify right side
    79,172.50x = 4,737,439,431.09
  5. Step 5: Solve for x
    x = 4,737,439,431.09/79,172.50
  6. Step 6: Final answer
    x = 59,836.93

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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.