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Finding the Fourth Proportional to 91,891.88, 126,717.46 and 86,534.28

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Solution

The fourth proportional to 91,891.88, 126,717.46 and 86,534.28 is: 119,329.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,891.88 : 126,717.46 = 86,534.28 : x
  2. Step 2: Convert to fraction form
    91,891.88/126,717.46 = 86,534.28/x
  3. Step 3: Cross multiply
    91,891.88x = 126,717.46 × 86,534.28
  4. Step 4: Simplify right side
    91,891.88x = 10,965,404,164.53
  5. Step 5: Solve for x
    x = 10,965,404,164.53/91,891.88
  6. Step 6: Final answer
    x = 119,329.41

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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.