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Finding the Fourth Proportional to 51,074.60, 76,611.90 and 39,410.60

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Solution

The fourth proportional to 51,074.60, 76,611.90 and 39,410.60 is: 59,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,074.60 : 76,611.90 = 39,410.60 : x
  2. Step 2: Convert to fraction form
    51,074.60/76,611.90 = 39,410.60/x
  3. Step 3: Cross multiply
    51,074.60x = 76,611.90 × 39,410.60
  4. Step 4: Simplify right side
    51,074.60x = 3,019,320,946.14
  5. Step 5: Solve for x
    x = 3,019,320,946.14/51,074.60
  6. Step 6: Final answer
    x = 59,115.90

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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.