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Finding the Fourth Proportional to 199,648.32, 299,372.40 and 66,481.68

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Solution

The fourth proportional to 199,648.32, 299,372.40 and 66,481.68 is: 99,689.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,648.32 : 299,372.40 = 66,481.68 : x
  2. Step 2: Convert to fraction form
    199,648.32/299,372.40 = 66,481.68/x
  3. Step 3: Cross multiply
    199,648.32x = 299,372.40 × 66,481.68
  4. Step 4: Simplify right side
    199,648.32x = 19,902,780,097.63
  5. Step 5: Solve for x
    x = 19,902,780,097.63/199,648.32
  6. Step 6: Final answer
    x = 99,689.19

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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.