Home / 120,515.22-166,103.31-80,156.82

Finding the Fourth Proportional to 120,515.22, 166,103.31 and 80,156.82

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Solution

The fourth proportional to 120,515.22, 166,103.31 and 80,156.82 is: 110,478.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,515.22 : 166,103.31 = 80,156.82 : x
  2. Step 2: Convert to fraction form
    120,515.22/166,103.31 = 80,156.82/x
  3. Step 3: Cross multiply
    120,515.22x = 166,103.31 × 80,156.82
  4. Step 4: Simplify right side
    120,515.22x = 13,314,313,121.07
  5. Step 5: Solve for x
    x = 13,314,313,121.07/120,515.22
  6. Step 6: Final answer
    x = 110,478.27

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1.5x scale

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.