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Finding the Fourth Proportional to 111,128.40, 166,692.60 and 28,022.40

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Solution

The fourth proportional to 111,128.40, 166,692.60 and 28,022.40 is: 42,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,128.40 : 166,692.60 = 28,022.40 : x
  2. Step 2: Convert to fraction form
    111,128.40/166,692.60 = 28,022.40/x
  3. Step 3: Cross multiply
    111,128.40x = 166,692.60 × 28,022.40
  4. Step 4: Simplify right side
    111,128.40x = 4,671,126,714.24
  5. Step 5: Solve for x
    x = 4,671,126,714.24/111,128.40
  6. Step 6: Final answer
    x = 42,033.60

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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.