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Finding the Third Proportional to 55,420 and 118,780

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Solution

The third proportional to 55,420 and 118,780 is: 254,577.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,420 : 118,780 = 118,780 : x
  2. Step 2: Convert to fraction form
    55,420/118,780 = 118,780/x
  3. Step 3: Cross multiply
    55,420x = 118,780 × 118,780
  4. Step 4: Simplify right side
    55,420x = 14,108,688,400
  5. Step 5: Solve for x
    x = 14,108,688,400/55,420
  6. Step 6: Final answer
    x = 254,577.56

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.