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Finding the Fourth Proportional to 115,231.66, 158,929.54 and 74,958.28

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Solution

The fourth proportional to 115,231.66, 158,929.54 and 74,958.28 is: 103,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,231.66 : 158,929.54 = 74,958.28 : x
  2. Step 2: Convert to fraction form
    115,231.66/158,929.54 = 74,958.28/x
  3. Step 3: Cross multiply
    115,231.66x = 158,929.54 × 74,958.28
  4. Step 4: Simplify right side
    115,231.66x = 11,913,084,959.59
  5. Step 5: Solve for x
    x = 11,913,084,959.59/115,231.66
  6. Step 6: Final answer
    x = 103,383.78

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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.