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Finding the Fourth Proportional to 43,355.79, 65,063.25 and 19,982.43

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Solution

The fourth proportional to 43,355.79, 65,063.25 and 19,982.43 is: 29,987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,355.79 : 65,063.25 = 19,982.43 : x
  2. Step 2: Convert to fraction form
    43,355.79/65,063.25 = 19,982.43/x
  3. Step 3: Cross multiply
    43,355.79x = 65,063.25 × 19,982.43
  4. Step 4: Simplify right side
    43,355.79x = 1,300,121,838.70
  5. Step 5: Solve for x
    x = 1,300,121,838.70/43,355.79
  6. Step 6: Final answer
    x = 29,987.27

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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.