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Finding the Fourth Proportional to 120,358.66, 166,081.54 and 66,630.22

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Solution

The fourth proportional to 120,358.66, 166,081.54 and 66,630.22 is: 91,942.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,358.66 : 166,081.54 = 66,630.22 : x
  2. Step 2: Convert to fraction form
    120,358.66/166,081.54 = 66,630.22/x
  3. Step 3: Cross multiply
    120,358.66x = 166,081.54 × 66,630.22
  4. Step 4: Simplify right side
    120,358.66x = 11,066,049,548.14
  5. Step 5: Solve for x
    x = 11,066,049,548.14/120,358.66
  6. Step 6: Final answer
    x = 91,942.28

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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.