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Finding the Fourth Proportional to 65,935.38, 90,990.70 and 35,721.45

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Solution

The fourth proportional to 65,935.38, 90,990.70 and 35,721.45 is: 49,295.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,935.38 : 90,990.70 = 35,721.45 : x
  2. Step 2: Convert to fraction form
    65,935.38/90,990.70 = 35,721.45/x
  3. Step 3: Cross multiply
    65,935.38x = 90,990.70 × 35,721.45
  4. Step 4: Simplify right side
    65,935.38x = 3,250,319,651.21
  5. Step 5: Solve for x
    x = 3,250,319,651.21/65,935.38
  6. Step 6: Final answer
    x = 49,295.53

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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.