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Finding the Fourth Proportional to 203,700.21, 305,451.90 and 85,339.77

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Solution

The fourth proportional to 203,700.21, 305,451.90 and 85,339.77 is: 127,968.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,700.21 : 305,451.90 = 85,339.77 : x
  2. Step 2: Convert to fraction form
    203,700.21/305,451.90 = 85,339.77/x
  3. Step 3: Cross multiply
    203,700.21x = 305,451.90 × 85,339.77
  4. Step 4: Simplify right side
    203,700.21x = 26,067,194,892.06
  5. Step 5: Solve for x
    x = 26,067,194,892.06/203,700.21
  6. Step 6: Final answer
    x = 127,968.42

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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.