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Finding the Fourth Proportional to 203,800.08, 305,601.74 and 85,439.64

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Solution

The fourth proportional to 203,800.08, 305,601.74 and 85,439.64 is: 128,118.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,800.08 : 305,601.74 = 85,439.64 : x
  2. Step 2: Convert to fraction form
    203,800.08/305,601.74 = 85,439.64/x
  3. Step 3: Cross multiply
    203,800.08x = 305,601.74 × 85,439.64
  4. Step 4: Simplify right side
    203,800.08x = 26,110,502,648.97
  5. Step 5: Solve for x
    x = 26,110,502,648.97/203,800.08
  6. Step 6: Final answer
    x = 128,118.22

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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.