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Finding the Fourth Proportional to 54,536.40, 81,808.02 and 21,245.40

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Solution

The fourth proportional to 54,536.40, 81,808.02 and 21,245.40 is: 31,869.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,536.40 : 81,808.02 = 21,245.40 : x
  2. Step 2: Convert to fraction form
    54,536.40/81,808.02 = 21,245.40/x
  3. Step 3: Cross multiply
    54,536.40x = 81,808.02 × 21,245.40
  4. Step 4: Simplify right side
    54,536.40x = 1,738,044,108.11
  5. Step 5: Solve for x
    x = 1,738,044,108.11/54,536.40
  6. Step 6: Final answer
    x = 31,869.43

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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.