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Finding the Fourth Proportional to 65,721.96, 90,696.24 and 35,913.96

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Solution

The fourth proportional to 65,721.96, 90,696.24 and 35,913.96 is: 49,561.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.96 : 90,696.24 = 35,913.96 : x
  2. Step 2: Convert to fraction form
    65,721.96/90,696.24 = 35,913.96/x
  3. Step 3: Cross multiply
    65,721.96x = 90,696.24 × 35,913.96
  4. Step 4: Simplify right side
    65,721.96x = 3,257,261,135.51
  5. Step 5: Solve for x
    x = 3,257,261,135.51/65,721.96
  6. Step 6: Final answer
    x = 49,561.23

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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.