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Finding the Fourth Proportional to 216,990, 325,472.04 and 67,230.72

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Solution

The fourth proportional to 216,990, 325,472.04 and 67,230.72 is: 100,842.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,990 : 325,472.04 = 67,230.72 : x
  2. Step 2: Convert to fraction form
    216,990/325,472.04 = 67,230.72/x
  3. Step 3: Cross multiply
    216,990x = 325,472.04 × 67,230.72
  4. Step 4: Simplify right side
    216,990x = 21,881,719,589.07
  5. Step 5: Solve for x
    x = 21,881,719,589.07/216,990
  6. Step 6: Final answer
    x = 100,842.06

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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.