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Finding the Fourth Proportional to 81,082.65, 111,832.48 and 69,771.10

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Solution

The fourth proportional to 81,082.65, 111,832.48 and 69,771.10 is: 96,231.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,082.65 : 111,832.48 = 69,771.10 : x
  2. Step 2: Convert to fraction form
    81,082.65/111,832.48 = 69,771.10/x
  3. Step 3: Cross multiply
    81,082.65x = 111,832.48 × 69,771.10
  4. Step 4: Simplify right side
    81,082.65x = 7,802,675,145.33
  5. Step 5: Solve for x
    x = 7,802,675,145.33/81,082.65
  6. Step 6: Final answer
    x = 96,231.13

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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.