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Finding the Fourth Proportional to 216,920.81, 325,412.18 and 67,174.49

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Solution

The fourth proportional to 216,920.81, 325,412.18 and 67,174.49 is: 100,771.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,920.81 : 325,412.18 = 67,174.49 : x
  2. Step 2: Convert to fraction form
    216,920.81/325,412.18 = 67,174.49/x
  3. Step 3: Cross multiply
    216,920.81x = 325,412.18 × 67,174.49
  4. Step 4: Simplify right side
    216,920.81x = 21,859,395,268.35
  5. Step 5: Solve for x
    x = 21,859,395,268.35/216,920.81
  6. Step 6: Final answer
    x = 100,771.32

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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.