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Finding the Fourth Proportional to 216,464.58, 324,739.40 and 66,679.38

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Solution

The fourth proportional to 216,464.58, 324,739.40 and 66,679.38 is: 100,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,464.58 : 324,739.40 = 66,679.38 : x
  2. Step 2: Convert to fraction form
    216,464.58/324,739.40 = 66,679.38/x
  3. Step 3: Cross multiply
    216,464.58x = 324,739.40 × 66,679.38
  4. Step 4: Simplify right side
    216,464.58x = 21,653,421,520.18
  5. Step 5: Solve for x
    x = 21,653,421,520.18/216,464.58
  6. Step 6: Final answer
    x = 100,032.17

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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.