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Finding the Fourth Proportional to 120,605.70, 166,446.06 and 66,908

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Solution

The fourth proportional to 120,605.70, 166,446.06 and 66,908 is: 92,338.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,605.70 : 166,446.06 = 66,908 : x
  2. Step 2: Convert to fraction form
    120,605.70/166,446.06 = 66,908/x
  3. Step 3: Cross multiply
    120,605.70x = 166,446.06 × 66,908
  4. Step 4: Simplify right side
    120,605.70x = 11,136,572,982.48
  5. Step 5: Solve for x
    x = 11,136,572,982.48/120,605.70
  6. Step 6: Final answer
    x = 92,338.70

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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.