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Finding the Fourth Proportional to 71,205.86, 106,814.86 and 18,615.26

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Solution

The fourth proportional to 71,205.86, 106,814.86 and 18,615.26 is: 27,924.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,205.86 : 106,814.86 = 18,615.26 : x
  2. Step 2: Convert to fraction form
    71,205.86/106,814.86 = 18,615.26/x
  3. Step 3: Cross multiply
    71,205.86x = 106,814.86 × 18,615.26
  4. Step 4: Simplify right side
    71,205.86x = 1,988,386,390.76
  5. Step 5: Solve for x
    x = 1,988,386,390.76/71,205.86
  6. Step 6: Final answer
    x = 27,924.48

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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.