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Finding the Fourth Proportional to 54,151.41, 81,218.90 and 18,618.12

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Solution

The fourth proportional to 54,151.41, 81,218.90 and 18,618.12 is: 27,924.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,151.41 : 81,218.90 = 18,618.12 : x
  2. Step 2: Convert to fraction form
    54,151.41/81,218.90 = 18,618.12/x
  3. Step 3: Cross multiply
    54,151.41x = 81,218.90 × 18,618.12
  4. Step 4: Simplify right side
    54,151.41x = 1,512,143,133.38
  5. Step 5: Solve for x
    x = 1,512,143,133.38/54,151.41
  6. Step 6: Final answer
    x = 27,924.35

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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.