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Finding the Fourth Proportional to 248,299.95, 342,630.21 and 139,379.31

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Solution

The fourth proportional to 248,299.95, 342,630.21 and 139,379.31 is: 192,330.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,299.95 : 342,630.21 = 139,379.31 : x
  2. Step 2: Convert to fraction form
    248,299.95/342,630.21 = 139,379.31/x
  3. Step 3: Cross multiply
    248,299.95x = 342,630.21 × 139,379.31
  4. Step 4: Simplify right side
    248,299.95x = 47,755,562,254.96
  5. Step 5: Solve for x
    x = 47,755,562,254.96/248,299.95
  6. Step 6: Final answer
    x = 192,330.13

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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.