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Finding the Fourth Proportional to 131,652, 181,679.88 and 72,036

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Solution

The fourth proportional to 131,652, 181,679.88 and 72,036 is: 99,409.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,652 : 181,679.88 = 72,036 : x
  2. Step 2: Convert to fraction form
    131,652/181,679.88 = 72,036/x
  3. Step 3: Cross multiply
    131,652x = 181,679.88 × 72,036
  4. Step 4: Simplify right side
    131,652x = 13,087,491,835.68
  5. Step 5: Solve for x
    x = 13,087,491,835.68/131,652
  6. Step 6: Final answer
    x = 99,409.75

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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.