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Finding the Fourth Proportional to 7,141,909.62, 9,855,893.15 and 3,878,747.69

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Solution

The fourth proportional to 7,141,909.62, 9,855,893.15 and 3,878,747.69 is: 5,352,703.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,141,909.62 : 9,855,893.15 = 3,878,747.69 : x
  2. Step 2: Convert to fraction form
    7,141,909.62/9,855,893.15 = 3,878,747.69/x
  3. Step 3: Cross multiply
    7,141,909.62x = 9,855,893.15 × 3,878,747.69
  4. Step 4: Simplify right side
    7,141,909.62x = 38,228,522,719,776.12
  5. Step 5: Solve for x
    x = 38,228,522,719,776.12/7,141,909.62
  6. Step 6: Final answer
    x = 5,352,703.23

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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.