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Finding the Fourth Proportional to 248,299.88, 342,630.14 and 139,379.28

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Solution

The fourth proportional to 248,299.88, 342,630.14 and 139,379.28 is: 192,330.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,299.88 : 342,630.14 = 139,379.28 : x
  2. Step 2: Convert to fraction form
    248,299.88/342,630.14 = 139,379.28/x
  3. Step 3: Cross multiply
    248,299.88x = 342,630.14 × 139,379.28
  4. Step 4: Simplify right side
    248,299.88x = 47,755,540,237.74
  5. Step 5: Solve for x
    x = 47,755,540,237.74/248,299.88
  6. Step 6: Final answer
    x = 192,330.10

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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.