Home / 213,804.38-321,121.76-157,421.81

Finding the Fourth Proportional to 213,804.38, 321,121.76 and 157,421.81

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Solution

The fourth proportional to 213,804.38, 321,121.76 and 157,421.81 is: 236,438.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,804.38 : 321,121.76 = 157,421.81 : x
  2. Step 2: Convert to fraction form
    213,804.38/321,121.76 = 157,421.81/x
  3. Step 3: Cross multiply
    213,804.38x = 321,121.76 × 157,421.81
  4. Step 4: Simplify right side
    213,804.38x = 50,551,566,296.87
  5. Step 5: Solve for x
    x = 50,551,566,296.87/213,804.38
  6. Step 6: Final answer
    x = 236,438.41

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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.