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Finding the Fourth Proportional to 228,612.82, 315,485.65 and 126,644.88

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Solution

The fourth proportional to 228,612.82, 315,485.65 and 126,644.88 is: 174,769.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,612.82 : 315,485.65 = 126,644.88 : x
  2. Step 2: Convert to fraction form
    228,612.82/315,485.65 = 126,644.88/x
  3. Step 3: Cross multiply
    228,612.82x = 315,485.65 × 126,644.88
  4. Step 4: Simplify right side
    228,612.82x = 39,954,642,285.97
  5. Step 5: Solve for x
    x = 39,954,642,285.97/228,612.82
  6. Step 6: Final answer
    x = 174,769.91

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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.