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Finding the Fourth Proportional to 115,935.29, 159,990.69 and 65,634.29

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Solution

The fourth proportional to 115,935.29, 159,990.69 and 65,634.29 is: 90,575.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,935.29 : 159,990.69 = 65,634.29 : x
  2. Step 2: Convert to fraction form
    115,935.29/159,990.69 = 65,634.29/x
  3. Step 3: Cross multiply
    115,935.29x = 159,990.69 × 65,634.29
  4. Step 4: Simplify right side
    115,935.29x = 10,500,874,544.81
  5. Step 5: Solve for x
    x = 10,500,874,544.81/115,935.29
  6. Step 6: Final answer
    x = 90,575.31

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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.