Home / 142,049.20-196,037.40-81,639.40

Finding the Fourth Proportional to 142,049.20, 196,037.40 and 81,639.40

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Solution

The fourth proportional to 142,049.20, 196,037.40 and 81,639.40 is: 112,667.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,049.20 : 196,037.40 = 81,639.40 : x
  2. Step 2: Convert to fraction form
    142,049.20/196,037.40 = 81,639.40/x
  3. Step 3: Cross multiply
    142,049.20x = 196,037.40 × 81,639.40
  4. Step 4: Simplify right side
    142,049.20x = 16,004,375,713.56
  5. Step 5: Solve for x
    x = 16,004,375,713.56/142,049.20
  6. Step 6: Final answer
    x = 112,667.83

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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.