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Finding the Third Proportional to 66,153 and 135,816

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Solution

The third proportional to 66,153 and 135,816 is: 278,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,153 : 135,816 = 135,816 : x
  2. Step 2: Convert to fraction form
    66,153/135,816 = 135,816/x
  3. Step 3: Cross multiply
    66,153x = 135,816 × 135,816
  4. Step 4: Simplify right side
    66,153x = 18,445,985,856
  5. Step 5: Solve for x
    x = 18,445,985,856/66,153
  6. Step 6: Final answer
    x = 278,838.24

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.