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Finding the Fourth Proportional to 64,991.88, 89,689.38 and 35,183.88

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Solution

The fourth proportional to 64,991.88, 89,689.38 and 35,183.88 is: 48,554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.88 : 89,689.38 = 35,183.88 : x
  2. Step 2: Convert to fraction form
    64,991.88/89,689.38 = 35,183.88/x
  3. Step 3: Cross multiply
    64,991.88x = 89,689.38 × 35,183.88
  4. Step 4: Simplify right side
    64,991.88x = 3,155,620,383.19
  5. Step 5: Solve for x
    x = 3,155,620,383.19/64,991.88
  6. Step 6: Final answer
    x = 48,554.07

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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.