Home / 54,219.96-81,378.54-45,390.60

Finding the Fourth Proportional to 54,219.96, 81,378.54 and 45,390.60

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Solution

The fourth proportional to 54,219.96, 81,378.54 and 45,390.60 is: 68,126.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,219.96 : 81,378.54 = 45,390.60 : x
  2. Step 2: Convert to fraction form
    54,219.96/81,378.54 = 45,390.60/x
  3. Step 3: Cross multiply
    54,219.96x = 81,378.54 × 45,390.60
  4. Step 4: Simplify right side
    54,219.96x = 3,693,820,757.72
  5. Step 5: Solve for x
    x = 3,693,820,757.72/54,219.96
  6. Step 6: Final answer
    x = 68,126.59

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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.