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Finding the Fourth Proportional to 203,439.53, 280,735.29 and 112,790.19

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Solution

The fourth proportional to 203,439.53, 280,735.29 and 112,790.19 is: 155,644.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,439.53 : 280,735.29 = 112,790.19 : x
  2. Step 2: Convert to fraction form
    203,439.53/280,735.29 = 112,790.19/x
  3. Step 3: Cross multiply
    203,439.53x = 280,735.29 × 112,790.19
  4. Step 4: Simplify right side
    203,439.53x = 31,664,186,698.81
  5. Step 5: Solve for x
    x = 31,664,186,698.81/203,439.53
  6. Step 6: Final answer
    x = 155,644.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.