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Finding the Fourth Proportional to 86,882.86, 119,879.76 and 65,395.18

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Solution

The fourth proportional to 86,882.86, 119,879.76 and 65,395.18 is: 90,231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,882.86 : 119,879.76 = 65,395.18 : x
  2. Step 2: Convert to fraction form
    86,882.86/119,879.76 = 65,395.18/x
  3. Step 3: Cross multiply
    86,882.86x = 119,879.76 × 65,395.18
  4. Step 4: Simplify right side
    86,882.86x = 7,839,558,483.56
  5. Step 5: Solve for x
    x = 7,839,558,483.56/86,882.86
  6. Step 6: Final answer
    x = 90,231.36

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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.