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Finding the Fourth Proportional to 228,917.91, 315,939.12 and 126,965.91

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Solution

The fourth proportional to 228,917.91, 315,939.12 and 126,965.91 is: 175,230.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,917.91 : 315,939.12 = 126,965.91 : x
  2. Step 2: Convert to fraction form
    228,917.91/315,939.12 = 126,965.91/x
  3. Step 3: Cross multiply
    228,917.91x = 315,939.12 × 126,965.91
  4. Step 4: Simplify right side
    228,917.91x = 40,113,497,875.40
  5. Step 5: Solve for x
    x = 40,113,497,875.40/228,917.91
  6. Step 6: Final answer
    x = 175,230.93

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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.