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Finding the Fourth Proportional to 203,428.40, 305,142.60 and 132,569.60

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Solution

The fourth proportional to 203,428.40, 305,142.60 and 132,569.60 is: 198,854.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,428.40 : 305,142.60 = 132,569.60 : x
  2. Step 2: Convert to fraction form
    203,428.40/305,142.60 = 132,569.60/x
  3. Step 3: Cross multiply
    203,428.40x = 305,142.60 × 132,569.60
  4. Step 4: Simplify right side
    203,428.40x = 40,452,632,424.96
  5. Step 5: Solve for x
    x = 40,452,632,424.96/203,428.40
  6. Step 6: Final answer
    x = 198,854.40

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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.