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Finding the Fourth Proportional to 71,509.52, 107,269.41 and 18,918.38

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Solution

The fourth proportional to 71,509.52, 107,269.41 and 18,918.38 is: 28,378.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,509.52 : 107,269.41 = 18,918.38 : x
  2. Step 2: Convert to fraction form
    71,509.52/107,269.41 = 18,918.38/x
  3. Step 3: Cross multiply
    71,509.52x = 107,269.41 × 18,918.38
  4. Step 4: Simplify right side
    71,509.52x = 2,029,362,924.41
  5. Step 5: Solve for x
    x = 2,029,362,924.41/71,509.52
  6. Step 6: Final answer
    x = 28,378.92

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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.