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Finding the Third Proportional to 91,120.88 and 128,261.25

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Solution

The third proportional to 91,120.88 and 128,261.25 is: 180,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,120.88 : 128,261.25 = 128,261.25 : x
  2. Step 2: Convert to fraction form
    91,120.88/128,261.25 = 128,261.25/x
  3. Step 3: Cross multiply
    91,120.88x = 128,261.25 × 128,261.25
  4. Step 4: Simplify right side
    91,120.88x = 16,450,948,251.56
  5. Step 5: Solve for x
    x = 16,450,948,251.56/91,120.88
  6. Step 6: Final answer
    x = 180,539.84

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.