Home / 70,042.03-105,063.76-20,122

Finding the Fourth Proportional to 70,042.03, 105,063.76 and 20,122

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Solution

The fourth proportional to 70,042.03, 105,063.76 and 20,122 is: 30,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,042.03 : 105,063.76 = 20,122 : x
  2. Step 2: Convert to fraction form
    70,042.03/105,063.76 = 20,122/x
  3. Step 3: Cross multiply
    70,042.03x = 105,063.76 × 20,122
  4. Step 4: Simplify right side
    70,042.03x = 2,114,092,978.72
  5. Step 5: Solve for x
    x = 2,114,092,978.72/70,042.03
  6. Step 6: Final answer
    x = 30,183.21

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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.