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Finding the Fourth Proportional to 120,496.80, 180,745.20 and 58,288.80

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Solution

The fourth proportional to 120,496.80, 180,745.20 and 58,288.80 is: 87,433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,496.80 : 180,745.20 = 58,288.80 : x
  2. Step 2: Convert to fraction form
    120,496.80/180,745.20 = 58,288.80/x
  3. Step 3: Cross multiply
    120,496.80x = 180,745.20 × 58,288.80
  4. Step 4: Simplify right side
    120,496.80x = 10,535,420,813.76
  5. Step 5: Solve for x
    x = 10,535,420,813.76/120,496.80
  6. Step 6: Final answer
    x = 87,433.20

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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.