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Finding the Fourth Proportional to 85,858.72, 118,481.04 and 48,132

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Solution

The fourth proportional to 85,858.72, 118,481.04 and 48,132 is: 66,419.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,858.72 : 118,481.04 = 48,132 : x
  2. Step 2: Convert to fraction form
    85,858.72/118,481.04 = 48,132/x
  3. Step 3: Cross multiply
    85,858.72x = 118,481.04 × 48,132
  4. Step 4: Simplify right side
    85,858.72x = 5,702,729,417.28
  5. Step 5: Solve for x
    x = 5,702,729,417.28/85,858.72
  6. Step 6: Final answer
    x = 66,419.92

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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.