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Finding the Fourth Proportional to 207,395.69, 311,259.63 and 95,128.79

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Solution

The fourth proportional to 207,395.69, 311,259.63 and 95,128.79 is: 142,769.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,395.69 : 311,259.63 = 95,128.79 : x
  2. Step 2: Convert to fraction form
    207,395.69/311,259.63 = 95,128.79/x
  3. Step 3: Cross multiply
    207,395.69x = 311,259.63 × 95,128.79
  4. Step 4: Simplify right side
    207,395.69x = 29,609,751,977.75
  5. Step 5: Solve for x
    x = 29,609,751,977.75/207,395.69
  6. Step 6: Final answer
    x = 142,769.37

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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.