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Finding the Fourth Proportional to 120,630.64, 166,471.03 and 66,919.06

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Solution

The fourth proportional to 120,630.64, 166,471.03 and 66,919.06 is: 92,348.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.64 : 166,471.03 = 66,919.06 : x
  2. Step 2: Convert to fraction form
    120,630.64/166,471.03 = 66,919.06/x
  3. Step 3: Cross multiply
    120,630.64x = 166,471.03 × 66,919.06
  4. Step 4: Simplify right side
    120,630.64x = 11,140,084,012.48
  5. Step 5: Solve for x
    x = 11,140,084,012.48/120,630.64
  6. Step 6: Final answer
    x = 92,348.71

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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.