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Finding the Fourth Proportional to 127,279, 190,919.13 and 43,039.72

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Solution

The fourth proportional to 127,279, 190,919.13 and 43,039.72 is: 64,559.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,279 : 190,919.13 = 43,039.72 : x
  2. Step 2: Convert to fraction form
    127,279/190,919.13 = 43,039.72/x
  3. Step 3: Cross multiply
    127,279x = 190,919.13 × 43,039.72
  4. Step 4: Simplify right side
    127,279x = 8,217,105,897.84
  5. Step 5: Solve for x
    x = 8,217,105,897.84/127,279
  6. Step 6: Final answer
    x = 64,559.79

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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.