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Finding the Fourth Proportional to 80,611.16, 120,919.45 and 36,238.06

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Solution

The fourth proportional to 80,611.16, 120,919.45 and 36,238.06 is: 54,358.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,611.16 : 120,919.45 = 36,238.06 : x
  2. Step 2: Convert to fraction form
    80,611.16/120,919.45 = 36,238.06/x
  3. Step 3: Cross multiply
    80,611.16x = 120,919.45 × 36,238.06
  4. Step 4: Simplify right side
    80,611.16x = 4,381,886,284.27
  5. Step 5: Solve for x
    x = 4,381,886,284.27/80,611.16
  6. Step 6: Final answer
    x = 54,358.31

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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.