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Finding the Fourth Proportional to 7,148,561.90, 9,865,115.34 and 3,885,375.68

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Solution

The fourth proportional to 7,148,561.90, 9,865,115.34 and 3,885,375.68 is: 5,361,872.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,148,561.90 : 9,865,115.34 = 3,885,375.68 : x
  2. Step 2: Convert to fraction form
    7,148,561.90/9,865,115.34 = 3,885,375.68/x
  3. Step 3: Cross multiply
    7,148,561.90x = 9,865,115.34 × 3,885,375.68
  4. Step 4: Simplify right side
    7,148,561.90x = 38,329,679,222,430.93
  5. Step 5: Solve for x
    x = 38,329,679,222,430.93/7,148,561.90
  6. Step 6: Final answer
    x = 5,361,872.75

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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.