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Finding the Fourth Proportional to 65,991.10, 98,986.65 and 41,107.90

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Solution

The fourth proportional to 65,991.10, 98,986.65 and 41,107.90 is: 61,661.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,991.10 : 98,986.65 = 41,107.90 : x
  2. Step 2: Convert to fraction form
    65,991.10/98,986.65 = 41,107.90/x
  3. Step 3: Cross multiply
    65,991.10x = 98,986.65 × 41,107.90
  4. Step 4: Simplify right side
    65,991.10x = 4,069,133,309.54
  5. Step 5: Solve for x
    x = 4,069,133,309.54/65,991.10
  6. Step 6: Final answer
    x = 61,661.85

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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.