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Finding the Fourth Proportional to 74,759.76, 112,064 and 48,481.20

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Solution

The fourth proportional to 74,759.76, 112,064 and 48,481.20 is: 72,672.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759.76 : 112,064 = 48,481.20 : x
  2. Step 2: Convert to fraction form
    74,759.76/112,064 = 48,481.20/x
  3. Step 3: Cross multiply
    74,759.76x = 112,064 × 48,481.20
  4. Step 4: Simplify right side
    74,759.76x = 5,432,997,196.80
  5. Step 5: Solve for x
    x = 5,432,997,196.80/74,759.76
  6. Step 6: Final answer
    x = 72,672.75

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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.