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Finding the Fourth Proportional to 101,059.44, 139,463.10 and 55,739.40

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Solution

The fourth proportional to 101,059.44, 139,463.10 and 55,739.40 is: 76,920.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,059.44 : 139,463.10 = 55,739.40 : x
  2. Step 2: Convert to fraction form
    101,059.44/139,463.10 = 55,739.40/x
  3. Step 3: Cross multiply
    101,059.44x = 139,463.10 × 55,739.40
  4. Step 4: Simplify right side
    101,059.44x = 7,773,589,516.14
  5. Step 5: Solve for x
    x = 7,773,589,516.14/101,059.44
  6. Step 6: Final answer
    x = 76,920.96

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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.