Home / 326,026.20-489,039.30-139,056.60

Finding the Fourth Proportional to 326,026.20, 489,039.30 and 139,056.60

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Solution

The fourth proportional to 326,026.20, 489,039.30 and 139,056.60 is: 208,584.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,026.20 : 489,039.30 = 139,056.60 : x
  2. Step 2: Convert to fraction form
    326,026.20/489,039.30 = 139,056.60/x
  3. Step 3: Cross multiply
    326,026.20x = 489,039.30 × 139,056.60
  4. Step 4: Simplify right side
    326,026.20x = 68,004,142,324.38
  5. Step 5: Solve for x
    x = 68,004,142,324.38/326,026.20
  6. Step 6: Final answer
    x = 208,584.90

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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.