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Finding the Fourth Proportional to 115,621.44, 159,559.68 and 65,321.28

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Solution

The fourth proportional to 115,621.44, 159,559.68 and 65,321.28 is: 90,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,621.44 : 159,559.68 = 65,321.28 : x
  2. Step 2: Convert to fraction form
    115,621.44/159,559.68 = 65,321.28/x
  3. Step 3: Cross multiply
    115,621.44x = 159,559.68 × 65,321.28
  4. Step 4: Simplify right side
    115,621.44x = 10,422,642,533.99
  5. Step 5: Solve for x
    x = 10,422,642,533.99/115,621.44
  6. Step 6: Final answer
    x = 90,144.55

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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.