Home / 129,133.20-178,220.52-72,544.56

Finding the Fourth Proportional to 129,133.20, 178,220.52 and 72,544.56

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Solution

The fourth proportional to 129,133.20, 178,220.52 and 72,544.56 is: 100,120.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,133.20 : 178,220.52 = 72,544.56 : x
  2. Step 2: Convert to fraction form
    129,133.20/178,220.52 = 72,544.56/x
  3. Step 3: Cross multiply
    129,133.20x = 178,220.52 × 72,544.56
  4. Step 4: Simplify right side
    129,133.20x = 12,928,929,206.37
  5. Step 5: Solve for x
    x = 12,928,929,206.37/129,133.20
  6. Step 6: Final answer
    x = 100,120.88

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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.