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Finding the Fourth Proportional to 54,618, 75,371.60 and 30,418.80

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Solution

The fourth proportional to 54,618, 75,371.60 and 30,418.80 is: 41,977.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,618 : 75,371.60 = 30,418.80 : x
  2. Step 2: Convert to fraction form
    54,618/75,371.60 = 30,418.80/x
  3. Step 3: Cross multiply
    54,618x = 75,371.60 × 30,418.80
  4. Step 4: Simplify right side
    54,618x = 2,292,713,626.08
  5. Step 5: Solve for x
    x = 2,292,713,626.08/54,618
  6. Step 6: Final answer
    x = 41,977.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.