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Finding the Fourth Proportional to 72,375.75, 99,878.54 and 40,544.64

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Solution

The fourth proportional to 72,375.75, 99,878.54 and 40,544.64 is: 55,951.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.75 : 99,878.54 = 40,544.64 : x
  2. Step 2: Convert to fraction form
    72,375.75/99,878.54 = 40,544.64/x
  3. Step 3: Cross multiply
    72,375.75x = 99,878.54 × 40,544.64
  4. Step 4: Simplify right side
    72,375.75x = 4,049,539,245.30
  5. Step 5: Solve for x
    x = 4,049,539,245.30/72,375.75
  6. Step 6: Final answer
    x = 55,951.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.