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Finding the Fourth Proportional to 154,891.20, 231,991.20 and 127,243.20

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Solution

The fourth proportional to 154,891.20, 231,991.20 and 127,243.20 is: 190,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,891.20 : 231,991.20 = 127,243.20 : x
  2. Step 2: Convert to fraction form
    154,891.20/231,991.20 = 127,243.20/x
  3. Step 3: Cross multiply
    154,891.20x = 231,991.20 × 127,243.20
  4. Step 4: Simplify right side
    154,891.20x = 29,519,302,659.84
  5. Step 5: Solve for x
    x = 29,519,302,659.84/154,891.20
  6. Step 6: Final answer
    x = 190,580.89

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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.