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Finding the Fourth Proportional to 221,530.96, 305,708.81 and 126,035.61

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Solution

The fourth proportional to 221,530.96, 305,708.81 and 126,035.61 is: 173,926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,530.96 : 305,708.81 = 126,035.61 : x
  2. Step 2: Convert to fraction form
    221,530.96/305,708.81 = 126,035.61/x
  3. Step 3: Cross multiply
    221,530.96x = 305,708.81 × 126,035.61
  4. Step 4: Simplify right side
    221,530.96x = 38,530,196,350.72
  5. Step 5: Solve for x
    x = 38,530,196,350.72/221,530.96
  6. Step 6: Final answer
    x = 173,926.91

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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.