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Finding the Fourth Proportional to 129,580.99, 193,932.60 and 79,692.73

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Solution

The fourth proportional to 129,580.99, 193,932.60 and 79,692.73 is: 119,269.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,580.99 : 193,932.60 = 79,692.73 : x
  2. Step 2: Convert to fraction form
    129,580.99/193,932.60 = 79,692.73/x
  3. Step 3: Cross multiply
    129,580.99x = 193,932.60 × 79,692.73
  4. Step 4: Simplify right side
    129,580.99x = 15,455,018,330.00
  5. Step 5: Solve for x
    x = 15,455,018,330.00/129,580.99
  6. Step 6: Final answer
    x = 119,269.18

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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.