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Finding the Fourth Proportional to 71,372.88, 107,055 and 18,782.28

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Solution

The fourth proportional to 71,372.88, 107,055 and 18,782.28 is: 28,172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,372.88 : 107,055 = 18,782.28 : x
  2. Step 2: Convert to fraction form
    71,372.88/107,055 = 18,782.28/x
  3. Step 3: Cross multiply
    71,372.88x = 107,055 × 18,782.28
  4. Step 4: Simplify right side
    71,372.88x = 2,010,736,985.40
  5. Step 5: Solve for x
    x = 2,010,736,985.40/71,372.88
  6. Step 6: Final answer
    x = 28,172.28

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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.