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Finding the Fourth Proportional to 228,310.46, 315,068.81 and 126,340.21

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Solution

The fourth proportional to 228,310.46, 315,068.81 and 126,340.21 is: 174,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,310.46 : 315,068.81 = 126,340.21 : x
  2. Step 2: Convert to fraction form
    228,310.46/315,068.81 = 126,340.21/x
  3. Step 3: Cross multiply
    228,310.46x = 315,068.81 × 126,340.21
  4. Step 4: Simplify right side
    228,310.46x = 39,805,859,619.85
  5. Step 5: Solve for x
    x = 39,805,859,619.85/228,310.46
  6. Step 6: Final answer
    x = 174,349.70

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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.