Home / 101,039.90-139,431.85-55,719.79

Finding the Fourth Proportional to 101,039.90, 139,431.85 and 55,719.79

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Solution

The fourth proportional to 101,039.90, 139,431.85 and 55,719.79 is: 76,891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,039.90 : 139,431.85 = 55,719.79 : x
  2. Step 2: Convert to fraction form
    101,039.90/139,431.85 = 55,719.79/x
  3. Step 3: Cross multiply
    101,039.90x = 139,431.85 × 55,719.79
  4. Step 4: Simplify right side
    101,039.90x = 7,769,112,913.43
  5. Step 5: Solve for x
    x = 7,769,112,913.43/101,039.90
  6. Step 6: Final answer
    x = 76,891.54

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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.