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Finding the Fourth Proportional to 213,626.48, 320,461.68 and 80,618.72

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Solution

The fourth proportional to 213,626.48, 320,461.68 and 80,618.72 is: 120,936.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,626.48 : 320,461.68 = 80,618.72 : x
  2. Step 2: Convert to fraction form
    213,626.48/320,461.68 = 80,618.72/x
  3. Step 3: Cross multiply
    213,626.48x = 320,461.68 × 80,618.72
  4. Step 4: Simplify right side
    213,626.48x = 25,835,210,450.65
  5. Step 5: Solve for x
    x = 25,835,210,450.65/213,626.48
  6. Step 6: Final answer
    x = 120,936.37

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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.