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Finding the Fourth Proportional to 45,991.73, 68,929.91 and 19,665.57

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Solution

The fourth proportional to 45,991.73, 68,929.91 and 19,665.57 is: 29,473.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,991.73 : 68,929.91 = 19,665.57 : x
  2. Step 2: Convert to fraction form
    45,991.73/68,929.91 = 19,665.57/x
  3. Step 3: Cross multiply
    45,991.73x = 68,929.91 × 19,665.57
  4. Step 4: Simplify right side
    45,991.73x = 1,355,545,970.20
  5. Step 5: Solve for x
    x = 1,355,545,970.20/45,991.73
  6. Step 6: Final answer
    x = 29,473.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.