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Finding the Fourth Proportional to 139,441.94, 192,431.08 and 75,779.72

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Solution

The fourth proportional to 139,441.94, 192,431.08 and 75,779.72 is: 104,576.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,441.94 : 192,431.08 = 75,779.72 : x
  2. Step 2: Convert to fraction form
    139,441.94/192,431.08 = 75,779.72/x
  3. Step 3: Cross multiply
    139,441.94x = 192,431.08 × 75,779.72
  4. Step 4: Simplify right side
    139,441.94x = 14,582,373,361.70
  5. Step 5: Solve for x
    x = 14,582,373,361.70/139,441.94
  6. Step 6: Final answer
    x = 104,576.67

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1.5x scale

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.