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Finding the Fourth Proportional to 55,280.08, 82,944.60 and 28,978.54

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Solution

The fourth proportional to 55,280.08, 82,944.60 and 28,978.54 is: 43,480.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,280.08 : 82,944.60 = 28,978.54 : x
  2. Step 2: Convert to fraction form
    55,280.08/82,944.60 = 28,978.54/x
  3. Step 3: Cross multiply
    55,280.08x = 82,944.60 × 28,978.54
  4. Step 4: Simplify right side
    55,280.08x = 2,403,613,408.88
  5. Step 5: Solve for x
    x = 2,403,613,408.88/55,280.08
  6. Step 6: Final answer
    x = 43,480.64

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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.