Home / 81,112.68-111,122.51-78,080.34

Finding the Fourth Proportional to 81,112.68, 111,122.51 and 78,080.34

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Solution

The fourth proportional to 81,112.68, 111,122.51 and 78,080.34 is: 106,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,112.68 : 111,122.51 = 78,080.34 : x
  2. Step 2: Convert to fraction form
    81,112.68/111,122.51 = 78,080.34/x
  3. Step 3: Cross multiply
    81,112.68x = 111,122.51 × 78,080.34
  4. Step 4: Simplify right side
    81,112.68x = 8,676,483,557.65
  5. Step 5: Solve for x
    x = 8,676,483,557.65/81,112.68
  6. Step 6: Final answer
    x = 106,968.28

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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.