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Finding the Fourth Proportional to 71,798.95, 107,690.20 and 19,212.54

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Solution

The fourth proportional to 71,798.95, 107,690.20 and 19,212.54 is: 28,816.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,798.95 : 107,690.20 = 19,212.54 : x
  2. Step 2: Convert to fraction form
    71,798.95/107,690.20 = 19,212.54/x
  3. Step 3: Cross multiply
    71,798.95x = 107,690.20 × 19,212.54
  4. Step 4: Simplify right side
    71,798.95x = 2,069,002,275.11
  5. Step 5: Solve for x
    x = 2,069,002,275.11/71,798.95
  6. Step 6: Final answer
    x = 28,816.61

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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.