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Finding the Fourth Proportional to 127,212.30, 190,692.90 and 71,079.30

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Solution

The fourth proportional to 127,212.30, 190,692.90 and 71,079.30 is: 106,548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,212.30 : 190,692.90 = 71,079.30 : x
  2. Step 2: Convert to fraction form
    127,212.30/190,692.90 = 71,079.30/x
  3. Step 3: Cross multiply
    127,212.30x = 190,692.90 × 71,079.30
  4. Step 4: Simplify right side
    127,212.30x = 13,554,317,846.97
  5. Step 5: Solve for x
    x = 13,554,317,846.97/127,212.30
  6. Step 6: Final answer
    x = 106,548.80

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1.5x scale

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.