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Finding the Fourth Proportional to 86,049.63, 118,715.31 and 63,442.28

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Solution

The fourth proportional to 86,049.63, 118,715.31 and 63,442.28 is: 87,525.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,049.63 : 118,715.31 = 63,442.28 : x
  2. Step 2: Convert to fraction form
    86,049.63/118,715.31 = 63,442.28/x
  3. Step 3: Cross multiply
    86,049.63x = 118,715.31 × 63,442.28
  4. Step 4: Simplify right side
    86,049.63x = 7,531,569,343.73
  5. Step 5: Solve for x
    x = 7,531,569,343.73/86,049.63
  6. Step 6: Final answer
    x = 87,525.88

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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.