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Finding the Fourth Proportional to 61,408.10, 91,982.55 and 48,188.90

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Solution

The fourth proportional to 61,408.10, 91,982.55 and 48,188.90 is: 72,181.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,408.10 : 91,982.55 = 48,188.90 : x
  2. Step 2: Convert to fraction form
    61,408.10/91,982.55 = 48,188.90/x
  3. Step 3: Cross multiply
    61,408.10x = 91,982.55 × 48,188.90
  4. Step 4: Simplify right side
    61,408.10x = 4,432,537,903.70
  5. Step 5: Solve for x
    x = 4,432,537,903.70/61,408.10
  6. Step 6: Final answer
    x = 72,181.65

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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.