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Finding the Third Proportional to 77,980 and 118,612

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Solution

The third proportional to 77,980 and 118,612 is: 180,415.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980 : 118,612 = 118,612 : x
  2. Step 2: Convert to fraction form
    77,980/118,612 = 118,612/x
  3. Step 3: Cross multiply
    77,980x = 118,612 × 118,612
  4. Step 4: Simplify right side
    77,980x = 14,068,806,544
  5. Step 5: Solve for x
    x = 14,068,806,544/77,980
  6. Step 6: Final answer
    x = 180,415.58

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.