Home / 111,378.10-166,775.55-81,634.90

Finding the Fourth Proportional to 111,378.10, 166,775.55 and 81,634.90

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Solution

The fourth proportional to 111,378.10, 166,775.55 and 81,634.90 is: 122,238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,378.10 : 166,775.55 = 81,634.90 : x
  2. Step 2: Convert to fraction form
    111,378.10/166,775.55 = 81,634.90/x
  3. Step 3: Cross multiply
    111,378.10x = 166,775.55 × 81,634.90
  4. Step 4: Simplify right side
    111,378.10x = 13,614,705,346.70
  5. Step 5: Solve for x
    x = 13,614,705,346.70/111,378.10
  6. Step 6: Final answer
    x = 122,238.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.