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Finding the Fourth Proportional to 117,245.78, 161,791.52 and 74,799.76

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Solution

The fourth proportional to 117,245.78, 161,791.52 and 74,799.76 is: 103,218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,245.78 : 161,791.52 = 74,799.76 : x
  2. Step 2: Convert to fraction form
    117,245.78/161,791.52 = 74,799.76/x
  3. Step 3: Cross multiply
    117,245.78x = 161,791.52 × 74,799.76
  4. Step 4: Simplify right side
    117,245.78x = 12,101,966,866.04
  5. Step 5: Solve for x
    x = 12,101,966,866.04/117,245.78
  6. Step 6: Final answer
    x = 103,218.78

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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.