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Finding the Fourth Proportional to 203,455.64, 280,772.16 and 112,815.43

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Solution

The fourth proportional to 203,455.64, 280,772.16 and 112,815.43 is: 155,687.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,455.64 : 280,772.16 = 112,815.43 : x
  2. Step 2: Convert to fraction form
    203,455.64/280,772.16 = 112,815.43/x
  3. Step 3: Cross multiply
    203,455.64x = 280,772.16 × 112,815.43
  4. Step 4: Simplify right side
    203,455.64x = 31,675,429,994.49
  5. Step 5: Solve for x
    x = 31,675,429,994.49/203,455.64
  6. Step 6: Final answer
    x = 155,687.16

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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.