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Finding the Fourth Proportional to 326,299.78, 489,354.96 and 136,755.18

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Solution

The fourth proportional to 326,299.78, 489,354.96 and 136,755.18 is: 205,093.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,299.78 : 489,354.96 = 136,755.18 : x
  2. Step 2: Convert to fraction form
    326,299.78/489,354.96 = 136,755.18/x
  3. Step 3: Cross multiply
    326,299.78x = 489,354.96 × 136,755.18
  4. Step 4: Simplify right side
    326,299.78x = 66,921,825,638.69
  5. Step 5: Solve for x
    x = 66,921,825,638.69/326,299.78
  6. Step 6: Final answer
    x = 205,093.08

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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.