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Finding the Fourth Proportional to 128,246.46, 192,369.69 and 34,749.78

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Solution

The fourth proportional to 128,246.46, 192,369.69 and 34,749.78 is: 52,124.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,246.46 : 192,369.69 = 34,749.78 : x
  2. Step 2: Convert to fraction form
    128,246.46/192,369.69 = 34,749.78/x
  3. Step 3: Cross multiply
    128,246.46x = 192,369.69 × 34,749.78
  4. Step 4: Simplify right side
    128,246.46x = 6,684,804,406.17
  5. Step 5: Solve for x
    x = 6,684,804,406.17/128,246.46
  6. Step 6: Final answer
    x = 52,124.67

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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.