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Finding the Fourth Proportional to 67,307.21, 100,957.17 and 20,556.44

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Solution

The fourth proportional to 67,307.21, 100,957.17 and 20,556.44 is: 30,833.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,307.21 : 100,957.17 = 20,556.44 : x
  2. Step 2: Convert to fraction form
    67,307.21/100,957.17 = 20,556.44/x
  3. Step 3: Cross multiply
    67,307.21x = 100,957.17 × 20,556.44
  4. Step 4: Simplify right side
    67,307.21x = 2,075,320,007.67
  5. Step 5: Solve for x
    x = 2,075,320,007.67/67,307.21
  6. Step 6: Final answer
    x = 30,833.55

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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.