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Finding the Fourth Proportional to 85,081.88, 127,538.27 and 40,656.75

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Solution

The fourth proportional to 85,081.88, 127,538.27 and 40,656.75 is: 60,944.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,081.88 : 127,538.27 = 40,656.75 : x
  2. Step 2: Convert to fraction form
    85,081.88/127,538.27 = 40,656.75/x
  3. Step 3: Cross multiply
    85,081.88x = 127,538.27 × 40,656.75
  4. Step 4: Simplify right side
    85,081.88x = 5,185,291,355.54
  5. Step 5: Solve for x
    x = 5,185,291,355.54/85,081.88
  6. Step 6: Final answer
    x = 60,944.72

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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.