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Finding the Fourth Proportional to 120,642.64, 166,487.04 and 66,927.66

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Solution

The fourth proportional to 120,642.64, 166,487.04 and 66,927.66 is: 92,360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,642.64 : 166,487.04 = 66,927.66 : x
  2. Step 2: Convert to fraction form
    120,642.64/166,487.04 = 66,927.66/x
  3. Step 3: Cross multiply
    120,642.64x = 166,487.04 × 66,927.66
  4. Step 4: Simplify right side
    120,642.64x = 11,142,588,174.85
  5. Step 5: Solve for x
    x = 11,142,588,174.85/120,642.64
  6. Step 6: Final answer
    x = 92,360.28

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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.