Home / 127,814.40-191,721.60-81,273.60

Finding the Fourth Proportional to 127,814.40, 191,721.60 and 81,273.60

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Solution

The fourth proportional to 127,814.40, 191,721.60 and 81,273.60 is: 121,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,814.40 : 191,721.60 = 81,273.60 : x
  2. Step 2: Convert to fraction form
    127,814.40/191,721.60 = 81,273.60/x
  3. Step 3: Cross multiply
    127,814.40x = 191,721.60 × 81,273.60
  4. Step 4: Simplify right side
    127,814.40x = 15,581,904,629.76
  5. Step 5: Solve for x
    x = 15,581,904,629.76/127,814.40
  6. Step 6: Final answer
    x = 121,910.40

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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.