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Finding the Fourth Proportional to 69,191.71, 103,787.66 and 19,271.95

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Solution

The fourth proportional to 69,191.71, 103,787.66 and 19,271.95 is: 28,907.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,191.71 : 103,787.66 = 19,271.95 : x
  2. Step 2: Convert to fraction form
    69,191.71/103,787.66 = 19,271.95/x
  3. Step 3: Cross multiply
    69,191.71x = 103,787.66 × 19,271.95
  4. Step 4: Simplify right side
    69,191.71x = 2,000,190,382.85
  5. Step 5: Solve for x
    x = 2,000,190,382.85/69,191.71
  6. Step 6: Final answer
    x = 28,907.95

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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.