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Finding the Fourth Proportional to 65,486.53, 90,382.25 and 38,635.61

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Solution

The fourth proportional to 65,486.53, 90,382.25 and 38,635.61 is: 53,323.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,486.53 : 90,382.25 = 38,635.61 : x
  2. Step 2: Convert to fraction form
    65,486.53/90,382.25 = 38,635.61/x
  3. Step 3: Cross multiply
    65,486.53x = 90,382.25 × 38,635.61
  4. Step 4: Simplify right side
    65,486.53x = 3,491,973,361.92
  5. Step 5: Solve for x
    x = 3,491,973,361.92/65,486.53
  6. Step 6: Final answer
    x = 53,323.54

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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.