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Finding the Fourth Proportional to 80,190, 110,586.87 and 57,640.82

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Solution

The fourth proportional to 80,190, 110,586.87 and 57,640.82 is: 79,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,190 : 110,586.87 = 57,640.82 : x
  2. Step 2: Convert to fraction form
    80,190/110,586.87 = 57,640.82/x
  3. Step 3: Cross multiply
    80,190x = 110,586.87 × 57,640.82
  4. Step 4: Simplify right side
    80,190x = 6,374,317,315.10
  5. Step 5: Solve for x
    x = 6,374,317,315.10/80,190
  6. Step 6: Final answer
    x = 79,490.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.