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Finding the Fourth Proportional to 103,436.30, 155,163.42 and 28,556.48

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Solution

The fourth proportional to 103,436.30, 155,163.42 and 28,556.48 is: 42,837.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,436.30 : 155,163.42 = 28,556.48 : x
  2. Step 2: Convert to fraction form
    103,436.30/155,163.42 = 28,556.48/x
  3. Step 3: Cross multiply
    103,436.30x = 155,163.42 × 28,556.48
  4. Step 4: Simplify right side
    103,436.30x = 4,430,920,324.14
  5. Step 5: Solve for x
    x = 4,430,920,324.14/103,436.30
  6. Step 6: Final answer
    x = 42,837.19

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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.