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Finding the Third Proportional to 54,705 and 117,780

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Solution

The third proportional to 54,705 and 117,780 is: 253,580.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,705 : 117,780 = 117,780 : x
  2. Step 2: Convert to fraction form
    54,705/117,780 = 117,780/x
  3. Step 3: Cross multiply
    54,705x = 117,780 × 117,780
  4. Step 4: Simplify right side
    54,705x = 13,872,128,400
  5. Step 5: Solve for x
    x = 13,872,128,400/54,705
  6. Step 6: Final answer
    x = 253,580.63

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.