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Finding the Fourth Proportional to 91,166, 125,813.40 and 51,422

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Solution

The fourth proportional to 91,166, 125,813.40 and 51,422 is: 70,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,166 : 125,813.40 = 51,422 : x
  2. Step 2: Convert to fraction form
    91,166/125,813.40 = 51,422/x
  3. Step 3: Cross multiply
    91,166x = 125,813.40 × 51,422
  4. Step 4: Simplify right side
    91,166x = 6,469,576,654.80
  5. Step 5: Solve for x
    x = 6,469,576,654.80/91,166
  6. Step 6: Final answer
    x = 70,964.80

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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.