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Finding the Fourth Proportional to 64,736.20, 97,128.60 and 25,321.60

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Solution

The fourth proportional to 64,736.20, 97,128.60 and 25,321.60 is: 37,991.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,736.20 : 97,128.60 = 25,321.60 : x
  2. Step 2: Convert to fraction form
    64,736.20/97,128.60 = 25,321.60/x
  3. Step 3: Cross multiply
    64,736.20x = 97,128.60 × 25,321.60
  4. Step 4: Simplify right side
    64,736.20x = 2,459,451,557.76
  5. Step 5: Solve for x
    x = 2,459,451,557.76/64,736.20
  6. Step 6: Final answer
    x = 37,991.90

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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.