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Finding the Fourth Proportional to 127,339.56, 175,729.64 and 79,620.57

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Solution

The fourth proportional to 127,339.56, 175,729.64 and 79,620.57 is: 109,877.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,339.56 : 175,729.64 = 79,620.57 : x
  2. Step 2: Convert to fraction form
    127,339.56/175,729.64 = 79,620.57/x
  3. Step 3: Cross multiply
    127,339.56x = 175,729.64 × 79,620.57
  4. Step 4: Simplify right side
    127,339.56x = 13,991,693,704.59
  5. Step 5: Solve for x
    x = 13,991,693,704.59/127,339.56
  6. Step 6: Final answer
    x = 109,877.04

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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.