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Finding the Fourth Proportional to 65,837.39, 98,708.49 and 39,120.03

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Solution

The fourth proportional to 65,837.39, 98,708.49 and 39,120.03 is: 58,651.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,837.39 : 98,708.49 = 39,120.03 : x
  2. Step 2: Convert to fraction form
    65,837.39/98,708.49 = 39,120.03/x
  3. Step 3: Cross multiply
    65,837.39x = 98,708.49 × 39,120.03
  4. Step 4: Simplify right side
    65,837.39x = 3,861,479,090.05
  5. Step 5: Solve for x
    x = 3,861,479,090.05/65,837.39
  6. Step 6: Final answer
    x = 58,651.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.