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Finding the Fourth Proportional to 111,375, 153,634.62 and 66,008.42

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Solution

The fourth proportional to 111,375, 153,634.62 and 66,008.42 is: 91,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,375 : 153,634.62 = 66,008.42 : x
  2. Step 2: Convert to fraction form
    111,375/153,634.62 = 66,008.42/x
  3. Step 3: Cross multiply
    111,375x = 153,634.62 × 66,008.42
  4. Step 4: Simplify right side
    111,375x = 10,141,178,578.99
  5. Step 5: Solve for x
    x = 10,141,178,578.99/111,375
  6. Step 6: Final answer
    x = 91,054.35

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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.