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Finding the Fourth Proportional to 203,933.60, 305,900.40 and 85,835.60

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Solution

The fourth proportional to 203,933.60, 305,900.40 and 85,835.60 is: 128,753.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,933.60 : 305,900.40 = 85,835.60 : x
  2. Step 2: Convert to fraction form
    203,933.60/305,900.40 = 85,835.60/x
  3. Step 3: Cross multiply
    203,933.60x = 305,900.40 × 85,835.60
  4. Step 4: Simplify right side
    203,933.60x = 26,257,144,374.24
  5. Step 5: Solve for x
    x = 26,257,144,374.24/203,933.60
  6. Step 6: Final answer
    x = 128,753.40

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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.