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Finding the Fourth Proportional to 79,161.66, 118,742.49 and 66,761.37

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Solution

The fourth proportional to 79,161.66, 118,742.49 and 66,761.37 is: 100,142.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,161.66 : 118,742.49 = 66,761.37 : x
  2. Step 2: Convert to fraction form
    79,161.66/118,742.49 = 66,761.37/x
  3. Step 3: Cross multiply
    79,161.66x = 118,742.49 × 66,761.37
  4. Step 4: Simplify right side
    79,161.66x = 7,927,411,309.61
  5. Step 5: Solve for x
    x = 7,927,411,309.61/79,161.66
  6. Step 6: Final answer
    x = 100,142.06

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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.