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Finding the Fourth Proportional to 203,792.80, 305,689.20 and 137,437.60

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Solution

The fourth proportional to 203,792.80, 305,689.20 and 137,437.60 is: 206,156.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,792.80 : 305,689.20 = 137,437.60 : x
  2. Step 2: Convert to fraction form
    203,792.80/305,689.20 = 137,437.60/x
  3. Step 3: Cross multiply
    203,792.80x = 305,689.20 × 137,437.60
  4. Step 4: Simplify right side
    203,792.80x = 42,013,189,993.92
  5. Step 5: Solve for x
    x = 42,013,189,993.92/203,792.80
  6. Step 6: Final answer
    x = 206,156.40

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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.