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Finding the Fourth Proportional to 210,379.48, 315,639.27 and 68,229.39

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Solution

The fourth proportional to 210,379.48, 315,639.27 and 68,229.39 is: 102,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,379.48 : 315,639.27 = 68,229.39 : x
  2. Step 2: Convert to fraction form
    210,379.48/315,639.27 = 68,229.39/x
  3. Step 3: Cross multiply
    210,379.48x = 315,639.27 × 68,229.39
  4. Step 4: Simplify right side
    210,379.48x = 21,535,874,852.15
  5. Step 5: Solve for x
    x = 21,535,874,852.15/210,379.48
  6. Step 6: Final answer
    x = 102,366.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.