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Finding the Fourth Proportional to 326,090.90, 489,112.05 and 136,502.30

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Solution

The fourth proportional to 326,090.90, 489,112.05 and 136,502.30 is: 204,743.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,090.90 : 489,112.05 = 136,502.30 : x
  2. Step 2: Convert to fraction form
    326,090.90/489,112.05 = 136,502.30/x
  3. Step 3: Cross multiply
    326,090.90x = 489,112.05 × 136,502.30
  4. Step 4: Simplify right side
    326,090.90x = 66,764,919,782.72
  5. Step 5: Solve for x
    x = 66,764,919,782.72/326,090.90
  6. Step 6: Final answer
    x = 204,743.28

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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.