Home / 80,692.12-120,999.76-28,095.16

Finding the Fourth Proportional to 80,692.12, 120,999.76 and 28,095.16

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Solution

The fourth proportional to 80,692.12, 120,999.76 and 28,095.16 is: 42,129.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,692.12 : 120,999.76 = 28,095.16 : x
  2. Step 2: Convert to fraction form
    80,692.12/120,999.76 = 28,095.16/x
  3. Step 3: Cross multiply
    80,692.12x = 120,999.76 × 28,095.16
  4. Step 4: Simplify right side
    80,692.12x = 3,399,507,617.16
  5. Step 5: Solve for x
    x = 3,399,507,617.16/80,692.12
  6. Step 6: Final answer
    x = 42,129.36

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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.