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Finding the Fourth Proportional to 120,651.25, 166,491.21 and 66,935.18

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Solution

The fourth proportional to 120,651.25, 166,491.21 and 66,935.18 is: 92,366.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,651.25 : 166,491.21 = 66,935.18 : x
  2. Step 2: Convert to fraction form
    120,651.25/166,491.21 = 66,935.18/x
  3. Step 3: Cross multiply
    120,651.25x = 166,491.21 × 66,935.18
  4. Step 4: Simplify right side
    120,651.25x = 11,144,119,526.00
  5. Step 5: Solve for x
    x = 11,144,119,526.00/120,651.25
  6. Step 6: Final answer
    x = 92,366.38

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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.