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Finding the Fourth Proportional to 86,608.94, 129,863.79 and 26,621.82

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Solution

The fourth proportional to 86,608.94, 129,863.79 and 26,621.82 is: 39,917.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,608.94 : 129,863.79 = 26,621.82 : x
  2. Step 2: Convert to fraction form
    86,608.94/129,863.79 = 26,621.82/x
  3. Step 3: Cross multiply
    86,608.94x = 129,863.79 × 26,621.82
  4. Step 4: Simplify right side
    86,608.94x = 3,457,210,441.90
  5. Step 5: Solve for x
    x = 3,457,210,441.90/86,608.94
  6. Step 6: Final answer
    x = 39,917.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.