Home / 126,781.40-190,172.10-76,917.80

Finding the Fourth Proportional to 126,781.40, 190,172.10 and 76,917.80

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Solution

The fourth proportional to 126,781.40, 190,172.10 and 76,917.80 is: 115,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,781.40 : 190,172.10 = 76,917.80 : x
  2. Step 2: Convert to fraction form
    126,781.40/190,172.10 = 76,917.80/x
  3. Step 3: Cross multiply
    126,781.40x = 190,172.10 × 76,917.80
  4. Step 4: Simplify right side
    126,781.40x = 14,627,619,553.38
  5. Step 5: Solve for x
    x = 14,627,619,553.38/126,781.40
  6. Step 6: Final answer
    x = 115,376.70

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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.