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Finding the Fourth Proportional to 101,007.91, 139,391.88 and 55,687.55

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Solution

The fourth proportional to 101,007.91, 139,391.88 and 55,687.55 is: 76,849.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,007.91 : 139,391.88 = 55,687.55 : x
  2. Step 2: Convert to fraction form
    101,007.91/139,391.88 = 55,687.55/x
  3. Step 3: Cross multiply
    101,007.91x = 139,391.88 × 55,687.55
  4. Step 4: Simplify right side
    101,007.91x = 7,762,392,635.57
  5. Step 5: Solve for x
    x = 7,762,392,635.57/101,007.91
  6. Step 6: Final answer
    x = 76,849.36

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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.