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Finding the Fourth Proportional to 71,628.52, 107,442.63 and 19,038

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Solution

The fourth proportional to 71,628.52, 107,442.63 and 19,038 is: 28,556.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.52 : 107,442.63 = 19,038 : x
  2. Step 2: Convert to fraction form
    71,628.52/107,442.63 = 19,038/x
  3. Step 3: Cross multiply
    71,628.52x = 107,442.63 × 19,038
  4. Step 4: Simplify right side
    71,628.52x = 2,045,492,789.94
  5. Step 5: Solve for x
    x = 2,045,492,789.94/71,628.52
  6. Step 6: Final answer
    x = 28,556.96

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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.