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Finding the Fourth Proportional to 104,196.80, 156,064.80 and 80,638.40

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Solution

The fourth proportional to 104,196.80, 156,064.80 and 80,638.40 is: 120,779.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,196.80 : 156,064.80 = 80,638.40 : x
  2. Step 2: Convert to fraction form
    104,196.80/156,064.80 = 80,638.40/x
  3. Step 3: Cross multiply
    104,196.80x = 156,064.80 × 80,638.40
  4. Step 4: Simplify right side
    104,196.80x = 12,584,815,768.32
  5. Step 5: Solve for x
    x = 12,584,815,768.32/104,196.80
  6. Step 6: Final answer
    x = 120,779.29

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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.