Home / 73,128.30-109,692.45-20,530.95

Finding the Fourth Proportional to 73,128.30, 109,692.45 and 20,530.95

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Solution

The fourth proportional to 73,128.30, 109,692.45 and 20,530.95 is: 30,796.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.30 : 109,692.45 = 20,530.95 : x
  2. Step 2: Convert to fraction form
    73,128.30/109,692.45 = 20,530.95/x
  3. Step 3: Cross multiply
    73,128.30x = 109,692.45 × 20,530.95
  4. Step 4: Simplify right side
    73,128.30x = 2,252,090,206.33
  5. Step 5: Solve for x
    x = 2,252,090,206.33/73,128.30
  6. Step 6: Final answer
    x = 30,796.43

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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.