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Finding the Fourth Proportional to 120,366.85, 166,106.15 and 66,651.87

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Solution

The fourth proportional to 120,366.85, 166,106.15 and 66,651.87 is: 91,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,366.85 : 166,106.15 = 66,651.87 : x
  2. Step 2: Convert to fraction form
    120,366.85/166,106.15 = 66,651.87/x
  3. Step 3: Cross multiply
    120,366.85x = 166,106.15 × 66,651.87
  4. Step 4: Simplify right side
    120,366.85x = 11,071,284,685.47
  5. Step 5: Solve for x
    x = 11,071,284,685.47/120,366.85
  6. Step 6: Final answer
    x = 91,979.52

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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.