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Finding the Fourth Proportional to 120,685.88, 166,539.48 and 66,967.04

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Solution

The fourth proportional to 120,685.88, 166,539.48 and 66,967.04 is: 92,410.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,685.88 : 166,539.48 = 66,967.04 : x
  2. Step 2: Convert to fraction form
    120,685.88/166,539.48 = 66,967.04/x
  3. Step 3: Cross multiply
    120,685.88x = 166,539.48 × 66,967.04
  4. Step 4: Simplify right side
    120,685.88x = 11,152,656,018.74
  5. Step 5: Solve for x
    x = 11,152,656,018.74/120,685.88
  6. Step 6: Final answer
    x = 92,410.61

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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.