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Finding the Fourth Proportional to 199,338.72, 299,007.12 and 66,228.96

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Solution

The fourth proportional to 199,338.72, 299,007.12 and 66,228.96 is: 99,343.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,338.72 : 299,007.12 = 66,228.96 : x
  2. Step 2: Convert to fraction form
    199,338.72/299,007.12 = 66,228.96/x
  3. Step 3: Cross multiply
    199,338.72x = 299,007.12 × 66,228.96
  4. Step 4: Simplify right side
    199,338.72x = 19,802,930,590.20
  5. Step 5: Solve for x
    x = 19,802,930,590.20/199,338.72
  6. Step 6: Final answer
    x = 99,343.12

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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.