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Finding the Fourth Proportional to 71,386.88, 107,085.56 and 18,796

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Solution

The fourth proportional to 71,386.88, 107,085.56 and 18,796 is: 28,195.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.88 : 107,085.56 = 18,796 : x
  2. Step 2: Convert to fraction form
    71,386.88/107,085.56 = 18,796/x
  3. Step 3: Cross multiply
    71,386.88x = 107,085.56 × 18,796
  4. Step 4: Simplify right side
    71,386.88x = 2,012,780,185.76
  5. Step 5: Solve for x
    x = 2,012,780,185.76/71,386.88
  6. Step 6: Final answer
    x = 28,195.38

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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.