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Finding the Fourth Proportional to 72,134.42, 99,546 and 40,304.66

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Solution

The fourth proportional to 72,134.42, 99,546 and 40,304.66 is: 55,620.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,134.42 : 99,546 = 40,304.66 : x
  2. Step 2: Convert to fraction form
    72,134.42/99,546 = 40,304.66/x
  3. Step 3: Cross multiply
    72,134.42x = 99,546 × 40,304.66
  4. Step 4: Simplify right side
    72,134.42x = 4,012,167,684.36
  5. Step 5: Solve for x
    x = 4,012,167,684.36/72,134.42
  6. Step 6: Final answer
    x = 55,620.71

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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.