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Finding the Fourth Proportional to 325,990.56, 489,037.68 and 139,003.68

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Solution

The fourth proportional to 325,990.56, 489,037.68 and 139,003.68 is: 208,527.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,990.56 : 489,037.68 = 139,003.68 : x
  2. Step 2: Convert to fraction form
    325,990.56/489,037.68 = 139,003.68/x
  3. Step 3: Cross multiply
    325,990.56x = 489,037.68 × 139,003.68
  4. Step 4: Simplify right side
    325,990.56x = 67,978,037,178.66
  5. Step 5: Solve for x
    x = 67,978,037,178.66/325,990.56
  6. Step 6: Final answer
    x = 208,527.62

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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.