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Finding the Fourth Proportional to 228,620.46, 315,492.11 and 126,645.61

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Solution

The fourth proportional to 228,620.46, 315,492.11 and 126,645.61 is: 174,768.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,620.46 : 315,492.11 = 126,645.61 : x
  2. Step 2: Convert to fraction form
    228,620.46/315,492.11 = 126,645.61/x
  3. Step 3: Cross multiply
    228,620.46x = 315,492.11 × 126,645.61
  4. Step 4: Simplify right side
    228,620.46x = 39,955,690,721.14
  5. Step 5: Solve for x
    x = 39,955,690,721.14/228,620.46
  6. Step 6: Final answer
    x = 174,768.66

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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.