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Finding the Fourth Proportional to 100,596.99, 138,884.73 and 66,634.41

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Solution

The fourth proportional to 100,596.99, 138,884.73 and 66,634.41 is: 91,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,596.99 : 138,884.73 = 66,634.41 : x
  2. Step 2: Convert to fraction form
    100,596.99/138,884.73 = 66,634.41/x
  3. Step 3: Cross multiply
    100,596.99x = 138,884.73 × 66,634.41
  4. Step 4: Simplify right side
    100,596.99x = 9,254,502,041.56
  5. Step 5: Solve for x
    x = 9,254,502,041.56/100,596.99
  6. Step 6: Final answer
    x = 91,995.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.