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Finding the Fourth Proportional to 120,362.66, 166,105.73 and 66,647.71

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Solution

The fourth proportional to 120,362.66, 166,105.73 and 66,647.71 is: 91,976.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,362.66 : 166,105.73 = 66,647.71 : x
  2. Step 2: Convert to fraction form
    120,362.66/166,105.73 = 66,647.71/x
  3. Step 3: Cross multiply
    120,362.66x = 166,105.73 × 66,647.71
  4. Step 4: Simplify right side
    120,362.66x = 11,070,566,953.58
  5. Step 5: Solve for x
    x = 11,070,566,953.58/120,362.66
  6. Step 6: Final answer
    x = 91,976.76

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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.