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Finding the Fourth Proportional to 54,219.20, 81,290.40 and 20,926.40

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Solution

The fourth proportional to 54,219.20, 81,290.40 and 20,926.40 is: 31,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,219.20 : 81,290.40 = 20,926.40 : x
  2. Step 2: Convert to fraction form
    54,219.20/81,290.40 = 20,926.40/x
  3. Step 3: Cross multiply
    54,219.20x = 81,290.40 × 20,926.40
  4. Step 4: Simplify right side
    54,219.20x = 1,701,115,426.56
  5. Step 5: Solve for x
    x = 1,701,115,426.56/54,219.20
  6. Step 6: Final answer
    x = 31,374.78

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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.