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Finding the Fourth Proportional to 80,633.60, 120,820.80 and 59,638.40

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Solution

The fourth proportional to 80,633.60, 120,820.80 and 59,638.40 is: 89,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,633.60 : 120,820.80 = 59,638.40 : x
  2. Step 2: Convert to fraction form
    80,633.60/120,820.80 = 59,638.40/x
  3. Step 3: Cross multiply
    80,633.60x = 120,820.80 × 59,638.40
  4. Step 4: Simplify right side
    80,633.60x = 7,205,559,198.72
  5. Step 5: Solve for x
    x = 7,205,559,198.72/80,633.60
  6. Step 6: Final answer
    x = 89,361.74

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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.