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Finding the Fourth Proportional to 7,179,508.98, 9,907,785.54 and 3,916,338.12

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Solution

The fourth proportional to 7,179,508.98, 9,907,785.54 and 3,916,338.12 is: 5,404,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179,508.98 : 9,907,785.54 = 3,916,338.12 : x
  2. Step 2: Convert to fraction form
    7,179,508.98/9,907,785.54 = 3,916,338.12/x
  3. Step 3: Cross multiply
    7,179,508.98x = 9,907,785.54 × 3,916,338.12
  4. Step 4: Simplify right side
    7,179,508.98x = 38,802,238,195,086.78
  5. Step 5: Solve for x
    x = 38,802,238,195,086.78/7,179,508.98
  6. Step 6: Final answer
    x = 5,404,581.05

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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.