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Finding the Fourth Proportional to 120,673.90, 166,531.13 and 66,963.91

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Solution

The fourth proportional to 120,673.90, 166,531.13 and 66,963.91 is: 92,410.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,673.90 : 166,531.13 = 66,963.91 : x
  2. Step 2: Convert to fraction form
    120,673.90/166,531.13 = 66,963.91/x
  3. Step 3: Cross multiply
    120,673.90x = 166,531.13 × 66,963.91
  4. Step 4: Simplify right side
    120,673.90x = 11,151,575,601.52
  5. Step 5: Solve for x
    x = 11,151,575,601.52/120,673.90
  6. Step 6: Final answer
    x = 92,410.83

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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.