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Finding the Fourth Proportional to 65,416.48, 90,286.56 and 38,557.44

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Solution

The fourth proportional to 65,416.48, 90,286.56 and 38,557.44 is: 53,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,416.48 : 90,286.56 = 38,557.44 : x
  2. Step 2: Convert to fraction form
    65,416.48/90,286.56 = 38,557.44/x
  3. Step 3: Cross multiply
    65,416.48x = 90,286.56 × 38,557.44
  4. Step 4: Simplify right side
    65,416.48x = 3,481,218,620.01
  5. Step 5: Solve for x
    x = 3,481,218,620.01/65,416.48
  6. Step 6: Final answer
    x = 53,216.23

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.