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Finding the Fourth Proportional to 115,908.36, 159,942.78 and 65,607.36

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Solution

The fourth proportional to 115,908.36, 159,942.78 and 65,607.36 is: 90,532.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,908.36 : 159,942.78 = 65,607.36 : x
  2. Step 2: Convert to fraction form
    115,908.36/159,942.78 = 65,607.36/x
  3. Step 3: Cross multiply
    115,908.36x = 159,942.78 × 65,607.36
  4. Step 4: Simplify right side
    115,908.36x = 10,493,423,546.86
  5. Step 5: Solve for x
    x = 10,493,423,546.86/115,908.36
  6. Step 6: Final answer
    x = 90,532.07

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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.