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Finding the Fourth Proportional to 203,808.03, 305,613.29 and 85,447.59

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Solution

The fourth proportional to 203,808.03, 305,613.29 and 85,447.59 is: 128,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,808.03 : 305,613.29 = 85,447.59 : x
  2. Step 2: Convert to fraction form
    203,808.03/305,613.29 = 85,447.59/x
  3. Step 3: Cross multiply
    203,808.03x = 305,613.29 × 85,447.59
  4. Step 4: Simplify right side
    203,808.03x = 26,113,919,316.09
  5. Step 5: Solve for x
    x = 26,113,919,316.09/203,808.03
  6. Step 6: Final answer
    x = 128,129.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.