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Finding the Fourth Proportional to 54,490.80, 81,736.20 and 19,431.60

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Solution

The fourth proportional to 54,490.80, 81,736.20 and 19,431.60 is: 29,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,490.80 : 81,736.20 = 19,431.60 : x
  2. Step 2: Convert to fraction form
    54,490.80/81,736.20 = 19,431.60/x
  3. Step 3: Cross multiply
    54,490.80x = 81,736.20 × 19,431.60
  4. Step 4: Simplify right side
    54,490.80x = 1,588,265,143.92
  5. Step 5: Solve for x
    x = 1,588,265,143.92/54,490.80
  6. Step 6: Final answer
    x = 29,147.40

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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.