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Finding the Fourth Proportional to 85,517.64, 128,171.25 and 47,998.98

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Solution

The fourth proportional to 85,517.64, 128,171.25 and 47,998.98 is: 71,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,517.64 : 128,171.25 = 47,998.98 : x
  2. Step 2: Convert to fraction form
    85,517.64/128,171.25 = 47,998.98/x
  3. Step 3: Cross multiply
    85,517.64x = 128,171.25 × 47,998.98
  4. Step 4: Simplify right side
    85,517.64x = 6,152,089,265.33
  5. Step 5: Solve for x
    x = 6,152,089,265.33/85,517.64
  6. Step 6: Final answer
    x = 71,939.42

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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.