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Finding the Fourth Proportional to 324,128.89, 486,156.94 and 124,309.09

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Solution

The fourth proportional to 324,128.89, 486,156.94 and 124,309.09 is: 186,449.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,128.89 : 486,156.94 = 124,309.09 : x
  2. Step 2: Convert to fraction form
    324,128.89/486,156.94 = 124,309.09/x
  3. Step 3: Cross multiply
    324,128.89x = 486,156.94 × 124,309.09
  4. Step 4: Simplify right side
    324,128.89x = 60,433,725,282.42
  5. Step 5: Solve for x
    x = 60,433,725,282.42/324,128.89
  6. Step 6: Final answer
    x = 186,449.67

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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.