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Finding the Fourth Proportional to 103,676.40, 155,485.44 and 28,778.40

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Solution

The fourth proportional to 103,676.40, 155,485.44 and 28,778.40 is: 43,159.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,676.40 : 155,485.44 = 28,778.40 : x
  2. Step 2: Convert to fraction form
    103,676.40/155,485.44 = 28,778.40/x
  3. Step 3: Cross multiply
    103,676.40x = 155,485.44 × 28,778.40
  4. Step 4: Simplify right side
    103,676.40x = 4,474,622,186.50
  5. Step 5: Solve for x
    x = 4,474,622,186.50/103,676.40
  6. Step 6: Final answer
    x = 43,159.51

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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.