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Finding the Fourth Proportional to 78,775.44, 118,128.60 and 28,842.60

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Solution

The fourth proportional to 78,775.44, 118,128.60 and 28,842.60 is: 43,251.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,775.44 : 118,128.60 = 28,842.60 : x
  2. Step 2: Convert to fraction form
    78,775.44/118,128.60 = 28,842.60/x
  3. Step 3: Cross multiply
    78,775.44x = 118,128.60 × 28,842.60
  4. Step 4: Simplify right side
    78,775.44x = 3,407,135,958.36
  5. Step 5: Solve for x
    x = 3,407,135,958.36/78,775.44
  6. Step 6: Final answer
    x = 43,251.25

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1.5x scale

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.