Home / 67,181.15-100,768.07-20,430.38

Finding the Fourth Proportional to 67,181.15, 100,768.07 and 20,430.38

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Solution

The fourth proportional to 67,181.15, 100,768.07 and 20,430.38 is: 30,644.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,181.15 : 100,768.07 = 20,430.38 : x
  2. Step 2: Convert to fraction form
    67,181.15/100,768.07 = 20,430.38/x
  3. Step 3: Cross multiply
    67,181.15x = 100,768.07 × 20,430.38
  4. Step 4: Simplify right side
    67,181.15x = 2,058,729,355.97
  5. Step 5: Solve for x
    x = 2,058,729,355.97/67,181.15
  6. Step 6: Final answer
    x = 30,644.45

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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.