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Finding the Fourth Proportional to 228,619.65, 315,491.70 and 126,644.81

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Solution

The fourth proportional to 228,619.65, 315,491.70 and 126,644.81 is: 174,767.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,619.65 : 315,491.70 = 126,644.81 : x
  2. Step 2: Convert to fraction form
    228,619.65/315,491.70 = 126,644.81/x
  3. Step 3: Cross multiply
    228,619.65x = 315,491.70 × 126,644.81
  4. Step 4: Simplify right side
    228,619.65x = 39,955,384,825.62
  5. Step 5: Solve for x
    x = 39,955,384,825.62/228,619.65
  6. Step 6: Final answer
    x = 174,767.94

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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.