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Finding the Third Proportional to 66,519 and 99,775.50

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Solution

The third proportional to 66,519 and 99,775.50 is: 149,658.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,519 : 99,775.50 = 99,775.50 : x
  2. Step 2: Convert to fraction form
    66,519/99,775.50 = 99,775.50/x
  3. Step 3: Cross multiply
    66,519x = 99,775.50 × 99,775.50
  4. Step 4: Simplify right side
    66,519x = 9,955,150,400.25
  5. Step 5: Solve for x
    x = 9,955,150,400.25/66,519
  6. Step 6: Final answer
    x = 149,658.75

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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.