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Finding the Fourth Proportional to 86,129.44, 118,868.48 and 47,892.80

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Solution

The fourth proportional to 86,129.44, 118,868.48 and 47,892.80 is: 66,097.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,129.44 : 118,868.48 = 47,892.80 : x
  2. Step 2: Convert to fraction form
    86,129.44/118,868.48 = 47,892.80/x
  3. Step 3: Cross multiply
    86,129.44x = 118,868.48 × 47,892.80
  4. Step 4: Simplify right side
    86,129.44x = 5,692,944,338.94
  5. Step 5: Solve for x
    x = 5,692,944,338.94/86,129.44
  6. Step 6: Final answer
    x = 66,097.54

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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.