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Finding the Fourth Proportional to 54,354.70, 81,537.63 and 18,815.97

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Solution

The fourth proportional to 54,354.70, 81,537.63 and 18,815.97 is: 28,225.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,354.70 : 81,537.63 = 18,815.97 : x
  2. Step 2: Convert to fraction form
    54,354.70/81,537.63 = 18,815.97/x
  3. Step 3: Cross multiply
    54,354.70x = 81,537.63 × 18,815.97
  4. Step 4: Simplify right side
    54,354.70x = 1,534,209,599.95
  5. Step 5: Solve for x
    x = 1,534,209,599.95/54,354.70
  6. Step 6: Final answer
    x = 28,225.89

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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.