Home / 100,556.37-138,768.93-55,235.43

Finding the Fourth Proportional to 100,556.37, 138,768.93 and 55,235.43

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Solution

The fourth proportional to 100,556.37, 138,768.93 and 55,235.43 is: 76,225.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,556.37 : 138,768.93 = 55,235.43 : x
  2. Step 2: Convert to fraction form
    100,556.37/138,768.93 = 55,235.43/x
  3. Step 3: Cross multiply
    100,556.37x = 138,768.93 × 55,235.43
  4. Step 4: Simplify right side
    100,556.37x = 7,664,961,519.19
  5. Step 5: Solve for x
    x = 7,664,961,519.19/100,556.37
  6. Step 6: Final answer
    x = 76,225.52

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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.