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Finding the Fourth Proportional to 7,149,127.69, 9,865,866.32 and 3,885,940.41

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Solution

The fourth proportional to 7,149,127.69, 9,865,866.32 and 3,885,940.41 is: 5,362,635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149,127.69 : 9,865,866.32 = 3,885,940.41 : x
  2. Step 2: Convert to fraction form
    7,149,127.69/9,865,866.32 = 3,885,940.41/x
  3. Step 3: Cross multiply
    7,149,127.69x = 9,865,866.32 × 3,885,940.41
  4. Step 4: Simplify right side
    7,149,127.69x = 38,338,168,612,545.99
  5. Step 5: Solve for x
    x = 38,338,168,612,545.99/7,149,127.69
  6. Step 6: Final answer
    x = 5,362,635.87

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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.