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Finding the Fourth Proportional to 69,068.30, 103,592.19 and 19,143.20

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Solution

The fourth proportional to 69,068.30, 103,592.19 and 19,143.20 is: 28,711.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,068.30 : 103,592.19 = 19,143.20 : x
  2. Step 2: Convert to fraction form
    69,068.30/103,592.19 = 19,143.20/x
  3. Step 3: Cross multiply
    69,068.30x = 103,592.19 × 19,143.20
  4. Step 4: Simplify right side
    69,068.30x = 1,983,085,493.65
  5. Step 5: Solve for x
    x = 1,983,085,493.65/69,068.30
  6. Step 6: Final answer
    x = 28,711.95

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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.