Home / 123,380.40-170,265.01-66,791.78

Finding the Fourth Proportional to 123,380.40, 170,265.01 and 66,791.78

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Solution

The fourth proportional to 123,380.40, 170,265.01 and 66,791.78 is: 92,172.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,380.40 : 170,265.01 = 66,791.78 : x
  2. Step 2: Convert to fraction form
    123,380.40/170,265.01 = 66,791.78/x
  3. Step 3: Cross multiply
    123,380.40x = 170,265.01 × 66,791.78
  4. Step 4: Simplify right side
    123,380.40x = 11,372,302,783.46
  5. Step 5: Solve for x
    x = 11,372,302,783.46/123,380.40
  6. Step 6: Final answer
    x = 92,172.68

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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.