Home / 134,121.12-185,103.20-80,435.64

Finding the Fourth Proportional to 134,121.12, 185,103.20 and 80,435.64

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Solution

The fourth proportional to 134,121.12, 185,103.20 and 80,435.64 is: 111,010.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,121.12 : 185,103.20 = 80,435.64 : x
  2. Step 2: Convert to fraction form
    134,121.12/185,103.20 = 80,435.64/x
  3. Step 3: Cross multiply
    134,121.12x = 185,103.20 × 80,435.64
  4. Step 4: Simplify right side
    134,121.12x = 14,888,894,358.05
  5. Step 5: Solve for x
    x = 14,888,894,358.05/134,121.12
  6. Step 6: Final answer
    x = 111,010.81

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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.