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Finding the Fourth Proportional to 219,120.19, 328,729.49 and 69,369.46

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Solution

The fourth proportional to 219,120.19, 328,729.49 and 69,369.46 is: 104,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,120.19 : 328,729.49 = 69,369.46 : x
  2. Step 2: Convert to fraction form
    219,120.19/328,729.49 = 69,369.46/x
  3. Step 3: Cross multiply
    219,120.19x = 328,729.49 × 69,369.46
  4. Step 4: Simplify right side
    219,120.19x = 22,803,787,207.38
  5. Step 5: Solve for x
    x = 22,803,787,207.38/219,120.19
  6. Step 6: Final answer
    x = 104,069.77

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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.