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Finding the Fourth Proportional to 54,938.80, 82,408.20 and 54,355.60

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Solution

The fourth proportional to 54,938.80, 82,408.20 and 54,355.60 is: 81,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,938.80 : 82,408.20 = 54,355.60 : x
  2. Step 2: Convert to fraction form
    54,938.80/82,408.20 = 54,355.60/x
  3. Step 3: Cross multiply
    54,938.80x = 82,408.20 × 54,355.60
  4. Step 4: Simplify right side
    54,938.80x = 4,479,347,155.92
  5. Step 5: Solve for x
    x = 4,479,347,155.92/54,938.80
  6. Step 6: Final answer
    x = 81,533.40

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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.