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Finding the Fourth Proportional to 101,518.82, 140,049.42 and 65,720.36

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Solution

The fourth proportional to 101,518.82, 140,049.42 and 65,720.36 is: 90,663.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,518.82 : 140,049.42 = 65,720.36 : x
  2. Step 2: Convert to fraction form
    101,518.82/140,049.42 = 65,720.36/x
  3. Step 3: Cross multiply
    101,518.82x = 140,049.42 × 65,720.36
  4. Step 4: Simplify right side
    101,518.82x = 9,204,097,599.94
  5. Step 5: Solve for x
    x = 9,204,097,599.94/101,518.82
  6. Step 6: Final answer
    x = 90,663.96

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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.