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Finding the Fourth Proportional to 203,156.88, 280,431.72 and 122,587.80

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Solution

The fourth proportional to 203,156.88, 280,431.72 and 122,587.80 is: 169,216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,156.88 : 280,431.72 = 122,587.80 : x
  2. Step 2: Convert to fraction form
    203,156.88/280,431.72 = 122,587.80/x
  3. Step 3: Cross multiply
    203,156.88x = 280,431.72 × 122,587.80
  4. Step 4: Simplify right side
    203,156.88x = 34,377,507,605.02
  5. Step 5: Solve for x
    x = 34,377,507,605.02/203,156.88
  6. Step 6: Final answer
    x = 169,216.56

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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.