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Finding the Fourth Proportional to 203,311.85, 280,557.63 and 112,662.51

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Solution

The fourth proportional to 203,311.85, 280,557.63 and 112,662.51 is: 155,467.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,311.85 : 280,557.63 = 112,662.51 : x
  2. Step 2: Convert to fraction form
    203,311.85/280,557.63 = 112,662.51/x
  3. Step 3: Cross multiply
    203,311.85x = 280,557.63 × 112,662.51
  4. Step 4: Simplify right side
    203,311.85x = 31,608,326,795.45
  5. Step 5: Solve for x
    x = 31,608,326,795.45/203,311.85
  6. Step 6: Final answer
    x = 155,467.22

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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.