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Finding the Fourth Proportional to 80,379.65, 120,372.62 and 56,628.83

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Solution

The fourth proportional to 80,379.65, 120,372.62 and 56,628.83 is: 84,804.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,379.65 : 120,372.62 = 56,628.83 : x
  2. Step 2: Convert to fraction form
    80,379.65/120,372.62 = 56,628.83/x
  3. Step 3: Cross multiply
    80,379.65x = 120,372.62 × 56,628.83
  4. Step 4: Simplify right side
    80,379.65x = 6,816,559,749.63
  5. Step 5: Solve for x
    x = 6,816,559,749.63/80,379.65
  6. Step 6: Final answer
    x = 84,804.55

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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.