Home / 120,366.18-166,105.31-66,651.20

Finding the Fourth Proportional to 120,366.18, 166,105.31 and 66,651.20

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Solution

The fourth proportional to 120,366.18, 166,105.31 and 66,651.20 is: 91,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,366.18 : 166,105.31 = 66,651.20 : x
  2. Step 2: Convert to fraction form
    120,366.18/166,105.31 = 66,651.20/x
  3. Step 3: Cross multiply
    120,366.18x = 166,105.31 × 66,651.20
  4. Step 4: Simplify right side
    120,366.18x = 11,071,118,189.43
  5. Step 5: Solve for x
    x = 11,071,118,189.43/120,366.18
  6. Step 6: Final answer
    x = 91,978.65

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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.