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Finding the Fourth Proportional to 7,186,458.78, 9,917,315.19 and 3,967,194.78

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Solution

The fourth proportional to 7,186,458.78, 9,917,315.19 and 3,967,194.78 is: 5,474,729.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,186,458.78 : 9,917,315.19 = 3,967,194.78 : x
  2. Step 2: Convert to fraction form
    7,186,458.78/9,917,315.19 = 3,967,194.78/x
  3. Step 3: Cross multiply
    7,186,458.78x = 9,917,315.19 × 3,967,194.78
  4. Step 4: Simplify right side
    7,186,458.78x = 39,343,921,053,382.70
  5. Step 5: Solve for x
    x = 39,343,921,053,382.70/7,186,458.78
  6. Step 6: Final answer
    x = 5,474,729.94

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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.