Home / 421,749.85-632,559.78-137,439.70

Finding the Fourth Proportional to 421,749.85, 632,559.78 and 137,439.70

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Solution

The fourth proportional to 421,749.85, 632,559.78 and 137,439.70 is: 206,138.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,749.85 : 632,559.78 = 137,439.70 : x
  2. Step 2: Convert to fraction form
    421,749.85/632,559.78 = 137,439.70/x
  3. Step 3: Cross multiply
    421,749.85x = 632,559.78 × 137,439.70
  4. Step 4: Simplify right side
    421,749.85x = 86,938,826,395.27
  5. Step 5: Solve for x
    x = 86,938,826,395.27/421,749.85
  6. Step 6: Final answer
    x = 206,138.37

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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.