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Finding the Fourth Proportional to 81,797.45, 112,918.46 and 61,662.47

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Solution

The fourth proportional to 81,797.45, 112,918.46 and 61,662.47 is: 85,122.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,797.45 : 112,918.46 = 61,662.47 : x
  2. Step 2: Convert to fraction form
    81,797.45/112,918.46 = 61,662.47/x
  3. Step 3: Cross multiply
    81,797.45x = 112,918.46 × 61,662.47
  4. Step 4: Simplify right side
    81,797.45x = 6,962,830,279.29
  5. Step 5: Solve for x
    x = 6,962,830,279.29/81,797.45
  6. Step 6: Final answer
    x = 85,122.83

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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.