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Finding the Fourth Proportional to 118,699.74, 177,923.34 and 81,249.30

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Solution

The fourth proportional to 118,699.74, 177,923.34 and 81,249.30 is: 121,787.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,699.74 : 177,923.34 = 81,249.30 : x
  2. Step 2: Convert to fraction form
    118,699.74/177,923.34 = 81,249.30/x
  3. Step 3: Cross multiply
    118,699.74x = 177,923.34 × 81,249.30
  4. Step 4: Simplify right side
    118,699.74x = 14,456,146,828.66
  5. Step 5: Solve for x
    x = 14,456,146,828.66/118,699.74
  6. Step 6: Final answer
    x = 121,787.52

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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.