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Finding the Third Proportional to 76,160 and 165,280

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Solution

The third proportional to 76,160 and 165,280 is: 358,685.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,160 : 165,280 = 165,280 : x
  2. Step 2: Convert to fraction form
    76,160/165,280 = 165,280/x
  3. Step 3: Cross multiply
    76,160x = 165,280 × 165,280
  4. Step 4: Simplify right side
    76,160x = 27,317,478,400
  5. Step 5: Solve for x
    x = 27,317,478,400/76,160
  6. Step 6: Final answer
    x = 358,685.38

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.