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Finding the Fourth Proportional to 54,452.70, 81,460.35 and 47,138.40

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Solution

The fourth proportional to 54,452.70, 81,460.35 and 47,138.40 is: 70,518.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,452.70 : 81,460.35 = 47,138.40 : x
  2. Step 2: Convert to fraction form
    54,452.70/81,460.35 = 47,138.40/x
  3. Step 3: Cross multiply
    54,452.70x = 81,460.35 × 47,138.40
  4. Step 4: Simplify right side
    54,452.70x = 3,839,910,562.44
  5. Step 5: Solve for x
    x = 3,839,910,562.44/54,452.70
  6. Step 6: Final answer
    x = 70,518.28

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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.