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Finding the Fourth Proportional to 203,563.75, 280,888.88 and 121,872.43

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Solution

The fourth proportional to 203,563.75, 280,888.88 and 121,872.43 is: 168,166.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,563.75 : 280,888.88 = 121,872.43 : x
  2. Step 2: Convert to fraction form
    203,563.75/280,888.88 = 121,872.43/x
  3. Step 3: Cross multiply
    203,563.75x = 280,888.88 × 121,872.43
  4. Step 4: Simplify right side
    203,563.75x = 34,232,609,511.02
  5. Step 5: Solve for x
    x = 34,232,609,511.02/203,563.75
  6. Step 6: Final answer
    x = 168,166.53

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1.5x scale

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.