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Finding the Fourth Proportional to 203,246.51, 280,322.21 and 138,767.60

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Solution

The fourth proportional to 203,246.51, 280,322.21 and 138,767.60 is: 191,391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,246.51 : 280,322.21 = 138,767.60 : x
  2. Step 2: Convert to fraction form
    203,246.51/280,322.21 = 138,767.60/x
  3. Step 3: Cross multiply
    203,246.51x = 280,322.21 × 138,767.60
  4. Step 4: Simplify right side
    203,246.51x = 38,899,638,212.95
  5. Step 5: Solve for x
    x = 38,899,638,212.95/203,246.51
  6. Step 6: Final answer
    x = 191,391.42

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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.