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Finding the Fourth Proportional to 115,927, 159,979.26 and 65,626

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Solution

The fourth proportional to 115,927, 159,979.26 and 65,626 is: 90,563.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,927 : 159,979.26 = 65,626 : x
  2. Step 2: Convert to fraction form
    115,927/159,979.26 = 65,626/x
  3. Step 3: Cross multiply
    115,927x = 159,979.26 × 65,626
  4. Step 4: Simplify right side
    115,927x = 10,498,798,916.76
  5. Step 5: Solve for x
    x = 10,498,798,916.76/115,927
  6. Step 6: Final answer
    x = 90,563.88

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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.