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Finding the Fourth Proportional to 120,673.65, 166,530.78 and 66,963.66

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Solution

The fourth proportional to 120,673.65, 166,530.78 and 66,963.66 is: 92,410.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,673.65 : 166,530.78 = 66,963.66 : x
  2. Step 2: Convert to fraction form
    120,673.65/166,530.78 = 66,963.66/x
  3. Step 3: Cross multiply
    120,673.65x = 166,530.78 × 66,963.66
  4. Step 4: Simplify right side
    120,673.65x = 11,151,510,531.45
  5. Step 5: Solve for x
    x = 11,151,510,531.45/120,673.65
  6. Step 6: Final answer
    x = 92,410.49

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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.