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Finding the Fourth Proportional to 65,373.93, 90,198.09 and 39,884.45

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Solution

The fourth proportional to 65,373.93, 90,198.09 and 39,884.45 is: 55,029.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,373.93 : 90,198.09 = 39,884.45 : x
  2. Step 2: Convert to fraction form
    65,373.93/90,198.09 = 39,884.45/x
  3. Step 3: Cross multiply
    65,373.93x = 90,198.09 × 39,884.45
  4. Step 4: Simplify right side
    65,373.93x = 3,597,500,759.71
  5. Step 5: Solve for x
    x = 3,597,500,759.71/65,373.93
  6. Step 6: Final answer
    x = 55,029.59

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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.