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Finding the Fourth Proportional to 120,672.65, 166,529.40 and 66,962.66

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Solution

The fourth proportional to 120,672.65, 166,529.40 and 66,962.66 is: 92,409.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,672.65 : 166,529.40 = 66,962.66 : x
  2. Step 2: Convert to fraction form
    120,672.65/166,529.40 = 66,962.66/x
  3. Step 3: Cross multiply
    120,672.65x = 166,529.40 × 66,962.66
  4. Step 4: Simplify right side
    120,672.65x = 11,151,251,592.20
  5. Step 5: Solve for x
    x = 11,151,251,592.20/120,672.65
  6. Step 6: Final answer
    x = 92,409.11

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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.