Home / 221,383.29-305,532.50-135,392.61

Finding the Fourth Proportional to 221,383.29, 305,532.50 and 135,392.61

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Solution

The fourth proportional to 221,383.29, 305,532.50 and 135,392.61 is: 186,856.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,383.29 : 305,532.50 = 135,392.61 : x
  2. Step 2: Convert to fraction form
    221,383.29/305,532.50 = 135,392.61/x
  3. Step 3: Cross multiply
    221,383.29x = 305,532.50 × 135,392.61
  4. Step 4: Simplify right side
    221,383.29x = 41,366,841,937.86
  5. Step 5: Solve for x
    x = 41,366,841,937.86/221,383.29
  6. Step 6: Final answer
    x = 186,856.21

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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.