Home / 87,936-121,517.28-66,675.84

Finding the Fourth Proportional to 87,936, 121,517.28 and 66,675.84

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Solution

The fourth proportional to 87,936, 121,517.28 and 66,675.84 is: 92,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,936 : 121,517.28 = 66,675.84 : x
  2. Step 2: Convert to fraction form
    87,936/121,517.28 = 66,675.84/x
  3. Step 3: Cross multiply
    87,936x = 121,517.28 × 66,675.84
  4. Step 4: Simplify right side
    87,936x = 8,102,266,718.52
  5. Step 5: Solve for x
    x = 8,102,266,718.52/87,936
  6. Step 6: Final answer
    x = 92,138.22

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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.