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Finding the Fourth Proportional to 203,800.34, 305,602.16 and 85,439.90

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Solution

The fourth proportional to 203,800.34, 305,602.16 and 85,439.90 is: 128,118.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,800.34 : 305,602.16 = 85,439.90 : x
  2. Step 2: Convert to fraction form
    203,800.34/305,602.16 = 85,439.90/x
  3. Step 3: Cross multiply
    203,800.34x = 305,602.16 × 85,439.90
  4. Step 4: Simplify right side
    203,800.34x = 26,110,616,034.97
  5. Step 5: Solve for x
    x = 26,110,616,034.97/203,800.34
  6. Step 6: Final answer
    x = 128,118.61

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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.