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Finding the Fourth Proportional to 86,908.96, 120,004.12 and 69,858.56

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Solution

The fourth proportional to 86,908.96, 120,004.12 and 69,858.56 is: 96,460.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.96 : 120,004.12 = 69,858.56 : x
  2. Step 2: Convert to fraction form
    86,908.96/120,004.12 = 69,858.56/x
  3. Step 3: Cross multiply
    86,908.96x = 120,004.12 × 69,858.56
  4. Step 4: Simplify right side
    86,908.96x = 8,383,315,017.27
  5. Step 5: Solve for x
    x = 8,383,315,017.27/86,908.96
  6. Step 6: Final answer
    x = 96,460.88

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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.