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Finding the Fourth Proportional to 68,303.78, 102,472.14 and 21,556.52

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Solution

The fourth proportional to 68,303.78, 102,472.14 and 21,556.52 is: 32,339.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,303.78 : 102,472.14 = 21,556.52 : x
  2. Step 2: Convert to fraction form
    68,303.78/102,472.14 = 21,556.52/x
  3. Step 3: Cross multiply
    68,303.78x = 102,472.14 × 21,556.52
  4. Step 4: Simplify right side
    68,303.78x = 2,208,942,735.35
  5. Step 5: Solve for x
    x = 2,208,942,735.35/68,303.78
  6. Step 6: Final answer
    x = 32,339.98

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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.