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Finding the Fourth Proportional to 71,573.27, 107,351.71 and 18,986.86

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Solution

The fourth proportional to 71,573.27, 107,351.71 and 18,986.86 is: 28,478.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,573.27 : 107,351.71 = 18,986.86 : x
  2. Step 2: Convert to fraction form
    71,573.27/107,351.71 = 18,986.86/x
  3. Step 3: Cross multiply
    71,573.27x = 107,351.71 × 18,986.86
  4. Step 4: Simplify right side
    71,573.27x = 2,038,271,572.68
  5. Step 5: Solve for x
    x = 2,038,271,572.68/71,573.27
  6. Step 6: Final answer
    x = 28,478.11

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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.