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Finding the Fourth Proportional to 101,131.80, 139,589.64 and 58,704

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Solution

The fourth proportional to 101,131.80, 139,589.64 and 58,704 is: 81,027.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,131.80 : 139,589.64 = 58,704 : x
  2. Step 2: Convert to fraction form
    101,131.80/139,589.64 = 58,704/x
  3. Step 3: Cross multiply
    101,131.80x = 139,589.64 × 58,704
  4. Step 4: Simplify right side
    101,131.80x = 8,194,470,226.56
  5. Step 5: Solve for x
    x = 8,194,470,226.56/101,131.80
  6. Step 6: Final answer
    x = 81,027.63

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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.