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Finding the Fourth Proportional to 71,324.65, 107,004.75 and 21,405.67

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Solution

The fourth proportional to 71,324.65, 107,004.75 and 21,405.67 is: 32,113.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,324.65 : 107,004.75 = 21,405.67 : x
  2. Step 2: Convert to fraction form
    71,324.65/107,004.75 = 21,405.67/x
  3. Step 3: Cross multiply
    71,324.65x = 107,004.75 × 21,405.67
  4. Step 4: Simplify right side
    71,324.65x = 2,290,508,019.15
  5. Step 5: Solve for x
    x = 2,290,508,019.15/71,324.65
  6. Step 6: Final answer
    x = 32,113.83

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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.