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Finding the Fourth Proportional to 117,781.75, 162,513.13 and 66,782.97

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Solution

The fourth proportional to 117,781.75, 162,513.13 and 66,782.97 is: 92,145.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,781.75 : 162,513.13 = 66,782.97 : x
  2. Step 2: Convert to fraction form
    117,781.75/162,513.13 = 66,782.97/x
  3. Step 3: Cross multiply
    117,781.75x = 162,513.13 × 66,782.97
  4. Step 4: Simplify right side
    117,781.75x = 10,853,109,485.40
  5. Step 5: Solve for x
    x = 10,853,109,485.40/117,781.75
  6. Step 6: Final answer
    x = 92,145.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.