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Finding the Fourth Proportional to 74,394.85, 102,704.88 and 57,361.77

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Solution

The fourth proportional to 74,394.85, 102,704.88 and 57,361.77 is: 79,190.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,394.85 : 102,704.88 = 57,361.77 : x
  2. Step 2: Convert to fraction form
    74,394.85/102,704.88 = 57,361.77/x
  3. Step 3: Cross multiply
    74,394.85x = 102,704.88 × 57,361.77
  4. Step 4: Simplify right side
    74,394.85x = 5,891,333,304.27
  5. Step 5: Solve for x
    x = 5,891,333,304.27/74,394.85
  6. Step 6: Final answer
    x = 79,190.07

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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.