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Finding the Fourth Proportional to 204,039.40, 305,913.30 and 91,627.60

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Solution

The fourth proportional to 204,039.40, 305,913.30 and 91,627.60 is: 137,375.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,039.40 : 305,913.30 = 91,627.60 : x
  2. Step 2: Convert to fraction form
    204,039.40/305,913.30 = 91,627.60/x
  3. Step 3: Cross multiply
    204,039.40x = 305,913.30 × 91,627.60
  4. Step 4: Simplify right side
    204,039.40x = 28,030,101,487.08
  5. Step 5: Solve for x
    x = 28,030,101,487.08/204,039.40
  6. Step 6: Final answer
    x = 137,375.93

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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.