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Finding the Fourth Proportional to 203,137.63, 280,326.48 and 112,491.64

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Solution

The fourth proportional to 203,137.63, 280,326.48 and 112,491.64 is: 155,236.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,137.63 : 280,326.48 = 112,491.64 : x
  2. Step 2: Convert to fraction form
    203,137.63/280,326.48 = 112,491.64/x
  3. Step 3: Cross multiply
    203,137.63x = 280,326.48 × 112,491.64
  4. Step 4: Simplify right side
    203,137.63x = 31,534,385,470.63
  5. Step 5: Solve for x
    x = 31,534,385,470.63/203,137.63
  6. Step 6: Final answer
    x = 155,236.55

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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.