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Finding the Fourth Proportional to 248,299.76, 342,629.96 and 139,379.15

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Solution

The fourth proportional to 248,299.76, 342,629.96 and 139,379.15 is: 192,329.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,299.76 : 342,629.96 = 139,379.15 : x
  2. Step 2: Convert to fraction form
    248,299.76/342,629.96 = 139,379.15/x
  3. Step 3: Cross multiply
    248,299.76x = 342,629.96 × 139,379.15
  4. Step 4: Simplify right side
    248,299.76x = 47,755,470,179.29
  5. Step 5: Solve for x
    x = 47,755,470,179.29/248,299.76
  6. Step 6: Final answer
    x = 192,329.91

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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.