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Finding the Fourth Proportional to 74,932.30, 112,067.79 and 66,670.30

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Solution

The fourth proportional to 74,932.30, 112,067.79 and 66,670.30 is: 99,711.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,932.30 : 112,067.79 = 66,670.30 : x
  2. Step 2: Convert to fraction form
    74,932.30/112,067.79 = 66,670.30/x
  3. Step 3: Cross multiply
    74,932.30x = 112,067.79 × 66,670.30
  4. Step 4: Simplify right side
    74,932.30x = 7,471,593,179.64
  5. Step 5: Solve for x
    x = 7,471,593,179.64/74,932.30
  6. Step 6: Final answer
    x = 99,711.25

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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.