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Finding the Fourth Proportional to 88,408.80, 132,418.80 and 72,856.80

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Solution

The fourth proportional to 88,408.80, 132,418.80 and 72,856.80 is: 109,125.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,408.80 : 132,418.80 = 72,856.80 : x
  2. Step 2: Convert to fraction form
    88,408.80/132,418.80 = 72,856.80/x
  3. Step 3: Cross multiply
    88,408.80x = 132,418.80 × 72,856.80
  4. Step 4: Simplify right side
    88,408.80x = 9,647,610,027.84
  5. Step 5: Solve for x
    x = 9,647,610,027.84/88,408.80
  6. Step 6: Final answer
    x = 109,125.00

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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.