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Finding the Fourth Proportional to 85,039.88, 127,565.08 and 25,879.91

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Solution

The fourth proportional to 85,039.88, 127,565.08 and 25,879.91 is: 38,821.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,039.88 : 127,565.08 = 25,879.91 : x
  2. Step 2: Convert to fraction form
    85,039.88/127,565.08 = 25,879.91/x
  3. Step 3: Cross multiply
    85,039.88x = 127,565.08 × 25,879.91
  4. Step 4: Simplify right side
    85,039.88x = 3,301,372,087.02
  5. Step 5: Solve for x
    x = 3,301,372,087.02/85,039.88
  6. Step 6: Final answer
    x = 38,821.46

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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.