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Finding the Fourth Proportional to 127,578.56, 176,062.56 and 79,816.64

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Solution

The fourth proportional to 127,578.56, 176,062.56 and 79,816.64 is: 110,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,578.56 : 176,062.56 = 79,816.64 : x
  2. Step 2: Convert to fraction form
    127,578.56/176,062.56 = 79,816.64/x
  3. Step 3: Cross multiply
    127,578.56x = 176,062.56 × 79,816.64
  4. Step 4: Simplify right side
    127,578.56x = 14,052,721,969.00
  5. Step 5: Solve for x
    x = 14,052,721,969.00/127,578.56
  6. Step 6: Final answer
    x = 110,149.56

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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.