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Finding the Fourth Proportional to 65,676.77, 90,617.25 and 40,173.82

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Solution

The fourth proportional to 65,676.77, 90,617.25 and 40,173.82 is: 55,429.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,676.77 : 90,617.25 = 40,173.82 : x
  2. Step 2: Convert to fraction form
    65,676.77/90,617.25 = 40,173.82/x
  3. Step 3: Cross multiply
    65,676.77x = 90,617.25 × 40,173.82
  4. Step 4: Simplify right side
    65,676.77x = 3,640,440,863.85
  5. Step 5: Solve for x
    x = 3,640,440,863.85/65,676.77
  6. Step 6: Final answer
    x = 55,429.66

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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.