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Finding the Fourth Proportional to 127,708.86, 176,153.82 and 79,879.20

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Solution

The fourth proportional to 127,708.86, 176,153.82 and 79,879.20 is: 110,180.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,708.86 : 176,153.82 = 79,879.20 : x
  2. Step 2: Convert to fraction form
    127,708.86/176,153.82 = 79,879.20/x
  3. Step 3: Cross multiply
    127,708.86x = 176,153.82 × 79,879.20
  4. Step 4: Simplify right side
    127,708.86x = 14,071,026,218.54
  5. Step 5: Solve for x
    x = 14,071,026,218.54/127,708.86
  6. Step 6: Final answer
    x = 110,180.50

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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.