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Finding the Fourth Proportional to 80,565.71, 120,817.51 and 30,619.49

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Solution

The fourth proportional to 80,565.71, 120,817.51 and 30,619.49 is: 45,917.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,565.71 : 120,817.51 = 30,619.49 : x
  2. Step 2: Convert to fraction form
    80,565.71/120,817.51 = 30,619.49/x
  3. Step 3: Cross multiply
    80,565.71x = 120,817.51 × 30,619.49
  4. Step 4: Simplify right side
    80,565.71x = 3,699,369,858.63
  5. Step 5: Solve for x
    x = 3,699,369,858.63/80,565.71
  6. Step 6: Final answer
    x = 45,917.43

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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.