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Finding the Fourth Proportional to 78,425.54, 117,625.92 and 65,183.54

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Solution

The fourth proportional to 78,425.54, 117,625.92 and 65,183.54 is: 97,765.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,425.54 : 117,625.92 = 65,183.54 : x
  2. Step 2: Convert to fraction form
    78,425.54/117,625.92 = 65,183.54/x
  3. Step 3: Cross multiply
    78,425.54x = 117,625.92 × 65,183.54
  4. Step 4: Simplify right side
    78,425.54x = 7,667,273,861.36
  5. Step 5: Solve for x
    x = 7,667,273,861.36/78,425.54
  6. Step 6: Final answer
    x = 97,765.01

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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.