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Finding the Fourth Proportional to 7,170,323.52, 9,894,918.96 and 3,907,161.12

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Solution

The fourth proportional to 7,170,323.52, 9,894,918.96 and 3,907,161.12 is: 5,391,812.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,170,323.52 : 9,894,918.96 = 3,907,161.12 : x
  2. Step 2: Convert to fraction form
    7,170,323.52/9,894,918.96 = 3,907,161.12/x
  3. Step 3: Cross multiply
    7,170,323.52x = 9,894,918.96 × 3,907,161.12
  4. Step 4: Simplify right side
    7,170,323.52x = 38,661,042,646,062.84
  5. Step 5: Solve for x
    x = 38,661,042,646,062.84/7,170,323.52
  6. Step 6: Final answer
    x = 5,391,812.87

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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.