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Finding the Third Proportional to 117,090 and 251,931

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Solution

The third proportional to 117,090 and 251,931 is: 542,055.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,090 : 251,931 = 251,931 : x
  2. Step 2: Convert to fraction form
    117,090/251,931 = 251,931/x
  3. Step 3: Cross multiply
    117,090x = 251,931 × 251,931
  4. Step 4: Simplify right side
    117,090x = 63,469,228,761
  5. Step 5: Solve for x
    x = 63,469,228,761/117,090
  6. Step 6: Final answer
    x = 542,055.08

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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.