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Finding the Fourth Proportional to 89,608.20, 134,485.20 and 86,692.20

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Solution

The fourth proportional to 89,608.20, 134,485.20 and 86,692.20 is: 130,108.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,608.20 : 134,485.20 = 86,692.20 : x
  2. Step 2: Convert to fraction form
    89,608.20/134,485.20 = 86,692.20/x
  3. Step 3: Cross multiply
    89,608.20x = 134,485.20 × 86,692.20
  4. Step 4: Simplify right side
    89,608.20x = 11,658,817,855.44
  5. Step 5: Solve for x
    x = 11,658,817,855.44/89,608.20
  6. Step 6: Final answer
    x = 130,108.83

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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.