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Finding the Fourth Proportional to 111,943.44, 168,005.07 and 55,781.28

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Solution

The fourth proportional to 111,943.44, 168,005.07 and 55,781.28 is: 83,716.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,943.44 : 168,005.07 = 55,781.28 : x
  2. Step 2: Convert to fraction form
    111,943.44/168,005.07 = 55,781.28/x
  3. Step 3: Cross multiply
    111,943.44x = 168,005.07 × 55,781.28
  4. Step 4: Simplify right side
    111,943.44x = 9,371,537,851.09
  5. Step 5: Solve for x
    x = 9,371,537,851.09/111,943.44
  6. Step 6: Final answer
    x = 83,716.72

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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.