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Finding the Fourth Proportional to 61,408.60, 91,983.30 and 48,189.40

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Solution

The fourth proportional to 61,408.60, 91,983.30 and 48,189.40 is: 72,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,408.60 : 91,983.30 = 48,189.40 : x
  2. Step 2: Convert to fraction form
    61,408.60/91,983.30 = 48,189.40/x
  3. Step 3: Cross multiply
    61,408.60x = 91,983.30 × 48,189.40
  4. Step 4: Simplify right side
    61,408.60x = 4,432,620,037.02
  5. Step 5: Solve for x
    x = 4,432,620,037.02/61,408.60
  6. Step 6: Final answer
    x = 72,182.40

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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.