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Finding the Fourth Proportional to 54,039.40, 80,986.20 and 38,438.80

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Solution

The fourth proportional to 54,039.40, 80,986.20 and 38,438.80 is: 57,606.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,039.40 : 80,986.20 = 38,438.80 : x
  2. Step 2: Convert to fraction form
    54,039.40/80,986.20 = 38,438.80/x
  3. Step 3: Cross multiply
    54,039.40x = 80,986.20 × 38,438.80
  4. Step 4: Simplify right side
    54,039.40x = 3,113,012,344.56
  5. Step 5: Solve for x
    x = 3,113,012,344.56/54,039.40
  6. Step 6: Final answer
    x = 57,606.35

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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.