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Finding the Third Proportional to 66,751 and 90,102

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Solution

The third proportional to 66,751 and 90,102 is: 121,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,751 : 90,102 = 90,102 : x
  2. Step 2: Convert to fraction form
    66,751/90,102 = 90,102/x
  3. Step 3: Cross multiply
    66,751x = 90,102 × 90,102
  4. Step 4: Simplify right side
    66,751x = 8,118,370,404
  5. Step 5: Solve for x
    x = 8,118,370,404/66,751
  6. Step 6: Final answer
    x = 121,621.70

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.