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Finding the Fourth Proportional to 7,171,107.34, 9,895,876.76 and 3,907,855.48

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Solution

The fourth proportional to 7,171,107.34, 9,895,876.76 and 3,907,855.48 is: 5,392,703.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171,107.34 : 9,895,876.76 = 3,907,855.48 : x
  2. Step 2: Convert to fraction form
    7,171,107.34/9,895,876.76 = 3,907,855.48/x
  3. Step 3: Cross multiply
    7,171,107.34x = 9,895,876.76 × 3,907,855.48
  4. Step 4: Simplify right side
    7,171,107.34x = 38,671,656,225,970.64
  5. Step 5: Solve for x
    x = 38,671,656,225,970.64/7,171,107.34
  6. Step 6: Final answer
    x = 5,392,703.58

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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.