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Finding the Fourth Proportional to 86,617.98, 129,939.29 and 26,651.43

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Solution

The fourth proportional to 86,617.98, 129,939.29 and 26,651.43 is: 39,980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,617.98 : 129,939.29 = 26,651.43 : x
  2. Step 2: Convert to fraction form
    86,617.98/129,939.29 = 26,651.43/x
  3. Step 3: Cross multiply
    86,617.98x = 129,939.29 × 26,651.43
  4. Step 4: Simplify right side
    86,617.98x = 3,463,067,858.37
  5. Step 5: Solve for x
    x = 3,463,067,858.37/86,617.98
  6. Step 6: Final answer
    x = 39,980.93

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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.