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Finding the Fourth Proportional to 111,128.40, 166,692.60 and 66,732.30

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Solution

The fourth proportional to 111,128.40, 166,692.60 and 66,732.30 is: 100,098.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,128.40 : 166,692.60 = 66,732.30 : x
  2. Step 2: Convert to fraction form
    111,128.40/166,692.60 = 66,732.30/x
  3. Step 3: Cross multiply
    111,128.40x = 166,692.60 × 66,732.30
  4. Step 4: Simplify right side
    111,128.40x = 11,123,780,590.98
  5. Step 5: Solve for x
    x = 11,123,780,590.98/111,128.40
  6. Step 6: Final answer
    x = 100,098.45

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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.