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Finding the Fourth Proportional to 103,597.21, 155,380.42 and 28,709.55

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Solution

The fourth proportional to 103,597.21, 155,380.42 and 28,709.55 is: 43,060.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,597.21 : 155,380.42 = 28,709.55 : x
  2. Step 2: Convert to fraction form
    103,597.21/155,380.42 = 28,709.55/x
  3. Step 3: Cross multiply
    103,597.21x = 155,380.42 × 28,709.55
  4. Step 4: Simplify right side
    103,597.21x = 4,460,901,620.33
  5. Step 5: Solve for x
    x = 4,460,901,620.33/103,597.21
  6. Step 6: Final answer
    x = 43,060.05

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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.