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Finding the Fourth Proportional to 203,009.76, 280,234.08 and 137,613.60

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Solution

The fourth proportional to 203,009.76, 280,234.08 and 137,613.60 is: 189,961.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,009.76 : 280,234.08 = 137,613.60 : x
  2. Step 2: Convert to fraction form
    203,009.76/280,234.08 = 137,613.60/x
  3. Step 3: Cross multiply
    203,009.76x = 280,234.08 × 137,613.60
  4. Step 4: Simplify right side
    203,009.76x = 38,564,020,591.49
  5. Step 5: Solve for x
    x = 38,564,020,591.49/203,009.76
  6. Step 6: Final answer
    x = 189,961.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.