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Finding the Fourth Proportional to 53,791.39, 80,631.49 and 20,502.51

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Solution

The fourth proportional to 53,791.39, 80,631.49 and 20,502.51 is: 30,732.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,791.39 : 80,631.49 = 20,502.51 : x
  2. Step 2: Convert to fraction form
    53,791.39/80,631.49 = 20,502.51/x
  3. Step 3: Cross multiply
    53,791.39x = 80,631.49 × 20,502.51
  4. Step 4: Simplify right side
    53,791.39x = 1,653,148,068.41
  5. Step 5: Solve for x
    x = 1,653,148,068.41/53,791.39
  6. Step 6: Final answer
    x = 30,732.58

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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.