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Finding the Fourth Proportional to 218,964.97, 328,464.75 and 69,216.67

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Solution

The fourth proportional to 218,964.97, 328,464.75 and 69,216.67 is: 103,830.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,964.97 : 328,464.75 = 69,216.67 : x
  2. Step 2: Convert to fraction form
    218,964.97/328,464.75 = 69,216.67/x
  3. Step 3: Cross multiply
    218,964.97x = 328,464.75 × 69,216.67
  4. Step 4: Simplify right side
    218,964.97x = 22,735,236,207.38
  5. Step 5: Solve for x
    x = 22,735,236,207.38/218,964.97
  6. Step 6: Final answer
    x = 103,830.47

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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.