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Finding the Fourth Proportional to 85,800, 118,408.86 and 48,086.40

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Solution

The fourth proportional to 85,800, 118,408.86 and 48,086.40 is: 66,361.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800 : 118,408.86 = 48,086.40 : x
  2. Step 2: Convert to fraction form
    85,800/118,408.86 = 48,086.40/x
  3. Step 3: Cross multiply
    85,800x = 118,408.86 × 48,086.40
  4. Step 4: Simplify right side
    85,800x = 5,693,855,805.50
  5. Step 5: Solve for x
    x = 5,693,855,805.50/85,800
  6. Step 6: Final answer
    x = 66,361.96

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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.