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Finding the Fourth Proportional to 65,021.45, 89,736.89 and 36,728.96

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Solution

The fourth proportional to 65,021.45, 89,736.89 and 36,728.96 is: 50,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,021.45 : 89,736.89 = 36,728.96 : x
  2. Step 2: Convert to fraction form
    65,021.45/89,736.89 = 36,728.96/x
  3. Step 3: Cross multiply
    65,021.45x = 89,736.89 × 36,728.96
  4. Step 4: Simplify right side
    65,021.45x = 3,295,942,011.01
  5. Step 5: Solve for x
    x = 3,295,942,011.01/65,021.45
  6. Step 6: Final answer
    x = 50,690.08

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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.