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Finding the Fourth Proportional to 65,935.79, 90,991.28 and 35,721.88

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Solution

The fourth proportional to 65,935.79, 90,991.28 and 35,721.88 is: 49,296.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,935.79 : 90,991.28 = 35,721.88 : x
  2. Step 2: Convert to fraction form
    65,935.79/90,991.28 = 35,721.88/x
  3. Step 3: Cross multiply
    65,935.79x = 90,991.28 × 35,721.88
  4. Step 4: Simplify right side
    65,935.79x = 3,250,379,447.03
  5. Step 5: Solve for x
    x = 3,250,379,447.03/65,935.79
  6. Step 6: Final answer
    x = 49,296.13

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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.