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Finding the Fourth Proportional to 81,893.97, 113,075.27 and 80,586.12

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Solution

The fourth proportional to 81,893.97, 113,075.27 and 80,586.12 is: 111,269.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,893.97 : 113,075.27 = 80,586.12 : x
  2. Step 2: Convert to fraction form
    81,893.97/113,075.27 = 80,586.12/x
  3. Step 3: Cross multiply
    81,893.97x = 113,075.27 × 80,586.12
  4. Step 4: Simplify right side
    81,893.97x = 9,112,296,874.32
  5. Step 5: Solve for x
    x = 9,112,296,874.32/81,893.97
  6. Step 6: Final answer
    x = 111,269.45

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1.5x scale

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.