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Finding the Third Proportional to 116,780 and 180,640

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Solution

The third proportional to 116,780 and 180,640 is: 279,421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,780 : 180,640 = 180,640 : x
  2. Step 2: Convert to fraction form
    116,780/180,640 = 180,640/x
  3. Step 3: Cross multiply
    116,780x = 180,640 × 180,640
  4. Step 4: Simplify right side
    116,780x = 32,630,809,600
  5. Step 5: Solve for x
    x = 32,630,809,600/116,780
  6. Step 6: Final answer
    x = 279,421.22

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.