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Finding the Fourth Proportional to 86,062.88, 118,687.92 and 55,816.64

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Solution

The fourth proportional to 86,062.88, 118,687.92 and 55,816.64 is: 76,975.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,062.88 : 118,687.92 = 55,816.64 : x
  2. Step 2: Convert to fraction form
    86,062.88/118,687.92 = 55,816.64/x
  3. Step 3: Cross multiply
    86,062.88x = 118,687.92 × 55,816.64
  4. Step 4: Simplify right side
    86,062.88x = 6,624,760,902.99
  5. Step 5: Solve for x
    x = 6,624,760,902.99/86,062.88
  6. Step 6: Final answer
    x = 76,975.82

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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.