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Finding the Fourth Proportional to 101,007.79, 139,391.70 and 55,687.36

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Solution

The fourth proportional to 101,007.79, 139,391.70 and 55,687.36 is: 76,849.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,007.79 : 139,391.70 = 55,687.36 : x
  2. Step 2: Convert to fraction form
    101,007.79/139,391.70 = 55,687.36/x
  3. Step 3: Cross multiply
    101,007.79x = 139,391.70 × 55,687.36
  4. Step 4: Simplify right side
    101,007.79x = 7,762,355,778.91
  5. Step 5: Solve for x
    x = 7,762,355,778.91/101,007.79
  6. Step 6: Final answer
    x = 76,849.08

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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.