Home / 129,216.96-178,318.44-72,628.56

Finding the Fourth Proportional to 129,216.96, 178,318.44 and 72,628.56

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Solution

The fourth proportional to 129,216.96, 178,318.44 and 72,628.56 is: 100,226.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,216.96 : 178,318.44 = 72,628.56 : x
  2. Step 2: Convert to fraction form
    129,216.96/178,318.44 = 72,628.56/x
  3. Step 3: Cross multiply
    129,216.96x = 178,318.44 × 72,628.56
  4. Step 4: Simplify right side
    129,216.96x = 12,951,011,518.65
  5. Step 5: Solve for x
    x = 12,951,011,518.65/129,216.96
  6. Step 6: Final answer
    x = 100,226.87

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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.