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Finding the Fourth Proportional to 120,336.88, 166,066.20 and 66,622.78

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Solution

The fourth proportional to 120,336.88, 166,066.20 and 66,622.78 is: 91,940.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,336.88 : 166,066.20 = 66,622.78 : x
  2. Step 2: Convert to fraction form
    120,336.88/166,066.20 = 66,622.78/x
  3. Step 3: Cross multiply
    120,336.88x = 166,066.20 × 66,622.78
  4. Step 4: Simplify right side
    120,336.88x = 11,063,791,908.04
  5. Step 5: Solve for x
    x = 11,063,791,908.04/120,336.88
  6. Step 6: Final answer
    x = 91,940.16

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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.