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Finding the Fourth Proportional to 203,328.81, 280,593.74 and 112,698.39

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Solution

The fourth proportional to 203,328.81, 280,593.74 and 112,698.39 is: 155,523.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,328.81 : 280,593.74 = 112,698.39 : x
  2. Step 2: Convert to fraction form
    203,328.81/280,593.74 = 112,698.39/x
  3. Step 3: Cross multiply
    203,328.81x = 280,593.74 × 112,698.39
  4. Step 4: Simplify right side
    203,328.81x = 31,622,463,023.82
  5. Step 5: Solve for x
    x = 31,622,463,023.82/203,328.81
  6. Step 6: Final answer
    x = 155,523.77

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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.