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Finding the Fourth Proportional to 65,837.50, 90,855.78 and 36,029.50

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Solution

The fourth proportional to 65,837.50, 90,855.78 and 36,029.50 is: 49,720.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,837.50 : 90,855.78 = 36,029.50 : x
  2. Step 2: Convert to fraction form
    65,837.50/90,855.78 = 36,029.50/x
  3. Step 3: Cross multiply
    65,837.50x = 90,855.78 × 36,029.50
  4. Step 4: Simplify right side
    65,837.50x = 3,273,488,325.51
  5. Step 5: Solve for x
    x = 3,273,488,325.51/65,837.50
  6. Step 6: Final answer
    x = 49,720.73

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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.