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Finding the Fourth Proportional to 326,101.90, 489,128.55 and 136,513.30

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Solution

The fourth proportional to 326,101.90, 489,128.55 and 136,513.30 is: 204,759.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,101.90 : 489,128.55 = 136,513.30 : x
  2. Step 2: Convert to fraction form
    326,101.90/489,128.55 = 136,513.30/x
  3. Step 3: Cross multiply
    326,101.90x = 489,128.55 × 136,513.30
  4. Step 4: Simplify right side
    326,101.90x = 66,772,552,484.72
  5. Step 5: Solve for x
    x = 66,772,552,484.72/326,101.90
  6. Step 6: Final answer
    x = 204,759.78

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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.