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Finding the Fourth Proportional to 281,132.72, 421,755.52 and 103,640.64

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Solution

The fourth proportional to 281,132.72, 421,755.52 and 103,640.64 is: 155,481.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,132.72 : 421,755.52 = 103,640.64 : x
  2. Step 2: Convert to fraction form
    281,132.72/421,755.52 = 103,640.64/x
  3. Step 3: Cross multiply
    281,132.72x = 421,755.52 × 103,640.64
  4. Step 4: Simplify right side
    281,132.72x = 43,711,012,016.33
  5. Step 5: Solve for x
    x = 43,711,012,016.33/281,132.72
  6. Step 6: Final answer
    x = 155,481.77

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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.