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Finding the Fourth Proportional to 120,782.97, 166,677.30 and 67,066.61

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Solution

The fourth proportional to 120,782.97, 166,677.30 and 67,066.61 is: 92,550.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,782.97 : 166,677.30 = 67,066.61 : x
  2. Step 2: Convert to fraction form
    120,782.97/166,677.30 = 67,066.61/x
  3. Step 3: Cross multiply
    120,782.97x = 166,677.30 × 67,066.61
  4. Step 4: Simplify right side
    120,782.97x = 11,178,480,641.57
  5. Step 5: Solve for x
    x = 11,178,480,641.57/120,782.97
  6. Step 6: Final answer
    x = 92,550.14

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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.