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Finding the Fourth Proportional to 85,990.98, 129,036.69 and 36,067.26

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Solution

The fourth proportional to 85,990.98, 129,036.69 and 36,067.26 is: 54,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.98 : 129,036.69 = 36,067.26 : x
  2. Step 2: Convert to fraction form
    85,990.98/129,036.69 = 36,067.26/x
  3. Step 3: Cross multiply
    85,990.98x = 129,036.69 × 36,067.26
  4. Step 4: Simplify right side
    85,990.98x = 4,653,999,847.77
  5. Step 5: Solve for x
    x = 4,653,999,847.77/85,990.98
  6. Step 6: Final answer
    x = 54,121.95

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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.