Home / 216,139.20-324,014.40-137,212.80

Finding the Fourth Proportional to 216,139.20, 324,014.40 and 137,212.80

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Solution

The fourth proportional to 216,139.20, 324,014.40 and 137,212.80 is: 205,695.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,139.20 : 324,014.40 = 137,212.80 : x
  2. Step 2: Convert to fraction form
    216,139.20/324,014.40 = 137,212.80/x
  3. Step 3: Cross multiply
    216,139.20x = 324,014.40 × 137,212.80
  4. Step 4: Simplify right side
    216,139.20x = 44,458,923,064.32
  5. Step 5: Solve for x
    x = 44,458,923,064.32/216,139.20
  6. Step 6: Final answer
    x = 205,695.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.