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Finding the Fourth Proportional to 81,620.38, 112,636.74 and 53,326

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Solution

The fourth proportional to 81,620.38, 112,636.74 and 53,326 is: 73,590.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,620.38 : 112,636.74 = 53,326 : x
  2. Step 2: Convert to fraction form
    81,620.38/112,636.74 = 53,326/x
  3. Step 3: Cross multiply
    81,620.38x = 112,636.74 × 53,326
  4. Step 4: Simplify right side
    81,620.38x = 6,006,466,797.24
  5. Step 5: Solve for x
    x = 6,006,466,797.24/81,620.38
  6. Step 6: Final answer
    x = 73,590.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.