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Finding the Fourth Proportional to 216,698.79, 324,964.47 and 74,517.21

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Solution

The fourth proportional to 216,698.79, 324,964.47 and 74,517.21 is: 111,747.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,698.79 : 324,964.47 = 74,517.21 : x
  2. Step 2: Convert to fraction form
    216,698.79/324,964.47 = 74,517.21/x
  3. Step 3: Cross multiply
    216,698.79x = 324,964.47 × 74,517.21
  4. Step 4: Simplify right side
    216,698.79x = 24,215,445,653.53
  5. Step 5: Solve for x
    x = 24,215,445,653.53/216,698.79
  6. Step 6: Final answer
    x = 111,747.03

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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.