Home / 126,005.20-189,153.60-72,739.60

Finding the Fourth Proportional to 126,005.20, 189,153.60 and 72,739.60

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Solution

The fourth proportional to 126,005.20, 189,153.60 and 72,739.60 is: 109,193.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,005.20 : 189,153.60 = 72,739.60 : x
  2. Step 2: Convert to fraction form
    126,005.20/189,153.60 = 72,739.60/x
  3. Step 3: Cross multiply
    126,005.20x = 189,153.60 × 72,739.60
  4. Step 4: Simplify right side
    126,005.20x = 13,758,957,202.56
  5. Step 5: Solve for x
    x = 13,758,957,202.56/126,005.20
  6. Step 6: Final answer
    x = 109,193.57

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1.5x scale

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.