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Finding the Fourth Proportional to 91,093.40, 136,640.10 and 84,872.60

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Solution

The fourth proportional to 91,093.40, 136,640.10 and 84,872.60 is: 127,308.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,093.40 : 136,640.10 = 84,872.60 : x
  2. Step 2: Convert to fraction form
    91,093.40/136,640.10 = 84,872.60/x
  3. Step 3: Cross multiply
    91,093.40x = 136,640.10 × 84,872.60
  4. Step 4: Simplify right side
    91,093.40x = 11,597,000,551.26
  5. Step 5: Solve for x
    x = 11,597,000,551.26/91,093.40
  6. Step 6: Final answer
    x = 127,308.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.