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Finding the Fourth Proportional to 127,338.81, 175,728.60 and 79,619.82

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Solution

The fourth proportional to 127,338.81, 175,728.60 and 79,619.82 is: 109,876.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,338.81 : 175,728.60 = 79,619.82 : x
  2. Step 2: Convert to fraction form
    127,338.81/175,728.60 = 79,619.82/x
  3. Step 3: Cross multiply
    127,338.81x = 175,728.60 × 79,619.82
  4. Step 4: Simplify right side
    127,338.81x = 13,991,479,500.85
  5. Step 5: Solve for x
    x = 13,991,479,500.85/127,338.81
  6. Step 6: Final answer
    x = 109,876.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.