Home / 123,378-170,261.64-66,789.84

Finding the Fourth Proportional to 123,378, 170,261.64 and 66,789.84

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Solution

The fourth proportional to 123,378, 170,261.64 and 66,789.84 is: 92,169.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,378 : 170,261.64 = 66,789.84 : x
  2. Step 2: Convert to fraction form
    123,378/170,261.64 = 66,789.84/x
  3. Step 3: Cross multiply
    123,378x = 170,261.64 × 66,789.84
  4. Step 4: Simplify right side
    123,378x = 11,371,747,693.74
  5. Step 5: Solve for x
    x = 11,371,747,693.74/123,378
  6. Step 6: Final answer
    x = 92,169.98

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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.