Home / 81,114.68-111,125.25-78,082.34

Finding the Fourth Proportional to 81,114.68, 111,125.25 and 78,082.34

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Solution

The fourth proportional to 81,114.68, 111,125.25 and 78,082.34 is: 106,971.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,114.68 : 111,125.25 = 78,082.34 : x
  2. Step 2: Convert to fraction form
    81,114.68/111,125.25 = 78,082.34/x
  3. Step 3: Cross multiply
    81,114.68x = 111,125.25 × 78,082.34
  4. Step 4: Simplify right side
    81,114.68x = 8,676,919,553.09
  5. Step 5: Solve for x
    x = 8,676,919,553.09/81,114.68
  6. Step 6: Final answer
    x = 106,971.01

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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.