Home / 218,932.54-302,120.72-122,139.25

Finding the Fourth Proportional to 218,932.54, 302,120.72 and 122,139.25

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Solution

The fourth proportional to 218,932.54, 302,120.72 and 122,139.25 is: 168,548.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,932.54 : 302,120.72 = 122,139.25 : x
  2. Step 2: Convert to fraction form
    218,932.54/302,120.72 = 122,139.25/x
  3. Step 3: Cross multiply
    218,932.54x = 302,120.72 × 122,139.25
  4. Step 4: Simplify right side
    218,932.54x = 36,900,797,539.56
  5. Step 5: Solve for x
    x = 36,900,797,539.56/218,932.54
  6. Step 6: Final answer
    x = 168,548.71

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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.