Home / 81,107.55-111,115.48-78,075.22

Finding the Fourth Proportional to 81,107.55, 111,115.48 and 78,075.22

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Solution

The fourth proportional to 81,107.55, 111,115.48 and 78,075.22 is: 106,961.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,107.55 : 111,115.48 = 78,075.22 : x
  2. Step 2: Convert to fraction form
    81,107.55/111,115.48 = 78,075.22/x
  3. Step 3: Cross multiply
    81,107.55x = 111,115.48 × 78,075.22
  4. Step 4: Simplify right side
    81,107.55x = 8,675,365,073.43
  5. Step 5: Solve for x
    x = 8,675,365,073.43/81,107.55
  6. Step 6: Final answer
    x = 106,961.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.