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Finding the Fourth Proportional to 79,172, 109,253.19 and 43,361.25

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Solution

The fourth proportional to 79,172, 109,253.19 and 43,361.25 is: 59,836.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172 : 109,253.19 = 43,361.25 : x
  2. Step 2: Convert to fraction form
    79,172/109,253.19 = 43,361.25/x
  3. Step 3: Cross multiply
    79,172x = 109,253.19 × 43,361.25
  4. Step 4: Simplify right side
    79,172x = 4,737,354,884.89
  5. Step 5: Solve for x
    x = 4,737,354,884.89/79,172
  6. Step 6: Final answer
    x = 59,836.24

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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.