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Finding the Fourth Proportional to 101,007.81, 139,391.75 and 55,687.46

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Solution

The fourth proportional to 101,007.81, 139,391.75 and 55,687.46 is: 76,849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,007.81 : 139,391.75 = 55,687.46 : x
  2. Step 2: Convert to fraction form
    101,007.81/139,391.75 = 55,687.46/x
  3. Step 3: Cross multiply
    101,007.81x = 139,391.75 × 55,687.46
  4. Step 4: Simplify right side
    101,007.81x = 7,762,372,467.43
  5. Step 5: Solve for x
    x = 7,762,372,467.43/101,007.81
  6. Step 6: Final answer
    x = 76,849.23

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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.