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Finding the Fourth Proportional to 117,473.76, 162,121.80 and 66,486.54

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Solution

The fourth proportional to 117,473.76, 162,121.80 and 66,486.54 is: 91,755.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,473.76 : 162,121.80 = 66,486.54 : x
  2. Step 2: Convert to fraction form
    117,473.76/162,121.80 = 66,486.54/x
  3. Step 3: Cross multiply
    117,473.76x = 162,121.80 × 66,486.54
  4. Step 4: Simplify right side
    117,473.76x = 10,778,917,540.57
  5. Step 5: Solve for x
    x = 10,778,917,540.57/117,473.76
  6. Step 6: Final answer
    x = 91,755.96

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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.