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Finding the Fourth Proportional to 203,279.90, 280,503 and 112,613.22

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Solution

The fourth proportional to 203,279.90, 280,503 and 112,613.22 is: 155,393.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,279.90 : 280,503 = 112,613.22 : x
  2. Step 2: Convert to fraction form
    203,279.90/280,503 = 112,613.22/x
  3. Step 3: Cross multiply
    203,279.90x = 280,503 × 112,613.22
  4. Step 4: Simplify right side
    203,279.90x = 31,588,346,049.66
  5. Step 5: Solve for x
    x = 31,588,346,049.66/203,279.90
  6. Step 6: Final answer
    x = 155,393.36

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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.