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Finding the Fourth Proportional to 103,795.20, 155,692.80 and 80,467.20

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Solution

The fourth proportional to 103,795.20, 155,692.80 and 80,467.20 is: 120,700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,795.20 : 155,692.80 = 80,467.20 : x
  2. Step 2: Convert to fraction form
    103,795.20/155,692.80 = 80,467.20/x
  3. Step 3: Cross multiply
    103,795.20x = 155,692.80 × 80,467.20
  4. Step 4: Simplify right side
    103,795.20x = 12,528,163,676.16
  5. Step 5: Solve for x
    x = 12,528,163,676.16/103,795.20
  6. Step 6: Final answer
    x = 120,700.80

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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.