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Finding the Fourth Proportional to 85,151.64, 127,665.04 and 28,976.65

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Solution

The fourth proportional to 85,151.64, 127,665.04 and 28,976.65 is: 43,443.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,151.64 : 127,665.04 = 28,976.65 : x
  2. Step 2: Convert to fraction form
    85,151.64/127,665.04 = 28,976.65/x
  3. Step 3: Cross multiply
    85,151.64x = 127,665.04 × 28,976.65
  4. Step 4: Simplify right side
    85,151.64x = 3,699,305,181.32
  5. Step 5: Solve for x
    x = 3,699,305,181.32/85,151.64
  6. Step 6: Final answer
    x = 43,443.73

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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.