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Finding the Fourth Proportional to 101,520.78, 140,162.41 and 65,238.45

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Solution

The fourth proportional to 101,520.78, 140,162.41 and 65,238.45 is: 90,070.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,520.78 : 140,162.41 = 65,238.45 : x
  2. Step 2: Convert to fraction form
    101,520.78/140,162.41 = 65,238.45/x
  3. Step 3: Cross multiply
    101,520.78x = 140,162.41 × 65,238.45
  4. Step 4: Simplify right side
    101,520.78x = 9,143,978,376.66
  5. Step 5: Solve for x
    x = 9,143,978,376.66/101,520.78
  6. Step 6: Final answer
    x = 90,070.02

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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.