Home / 105,728.55-158,589.78-39,167.20

Finding the Fourth Proportional to 105,728.55, 158,589.78 and 39,167.20

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Solution

The fourth proportional to 105,728.55, 158,589.78 and 39,167.20 is: 58,749.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,728.55 : 158,589.78 = 39,167.20 : x
  2. Step 2: Convert to fraction form
    105,728.55/158,589.78 = 39,167.20/x
  3. Step 3: Cross multiply
    105,728.55x = 158,589.78 × 39,167.20
  4. Step 4: Simplify right side
    105,728.55x = 6,211,517,631.22
  5. Step 5: Solve for x
    x = 6,211,517,631.22/105,728.55
  6. Step 6: Final answer
    x = 58,749.67

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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.