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Finding the Fourth Proportional to 74,486.12, 102,791.28 and 40,494.88

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Solution

The fourth proportional to 74,486.12, 102,791.28 and 40,494.88 is: 55,883.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,486.12 : 102,791.28 = 40,494.88 : x
  2. Step 2: Convert to fraction form
    74,486.12/102,791.28 = 40,494.88/x
  3. Step 3: Cross multiply
    74,486.12x = 102,791.28 × 40,494.88
  4. Step 4: Simplify right side
    74,486.12x = 4,162,520,548.65
  5. Step 5: Solve for x
    x = 4,162,520,548.65/74,486.12
  6. Step 6: Final answer
    x = 55,883.17

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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.