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Finding the Fourth Proportional to 118,710.74, 177,939.75 and 81,260.39

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Solution

The fourth proportional to 118,710.74, 177,939.75 and 81,260.39 is: 121,804.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,710.74 : 177,939.75 = 81,260.39 : x
  2. Step 2: Convert to fraction form
    118,710.74/177,939.75 = 81,260.39/x
  3. Step 3: Cross multiply
    118,710.74x = 177,939.75 × 81,260.39
  4. Step 4: Simplify right side
    118,710.74x = 14,459,453,481.50
  5. Step 5: Solve for x
    x = 14,459,453,481.50/118,710.74
  6. Step 6: Final answer
    x = 121,804.09

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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.