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Finding the Fourth Proportional to 120,361.95, 166,108.77 and 66,651.93

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Solution

The fourth proportional to 120,361.95, 166,108.77 and 66,651.93 is: 91,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,361.95 : 166,108.77 = 66,651.93 : x
  2. Step 2: Convert to fraction form
    120,361.95/166,108.77 = 66,651.93/x
  3. Step 3: Cross multiply
    120,361.95x = 166,108.77 × 66,651.93
  4. Step 4: Simplify right side
    120,361.95x = 11,071,470,110.43
  5. Step 5: Solve for x
    x = 11,071,470,110.43/120,361.95
  6. Step 6: Final answer
    x = 91,984.80

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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.