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Finding the Fourth Proportional to 86,172.36, 118,929.20 and 48,453.88

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Solution

The fourth proportional to 86,172.36, 118,929.20 and 48,453.88 is: 66,872.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,172.36 : 118,929.20 = 48,453.88 : x
  2. Step 2: Convert to fraction form
    86,172.36/118,929.20 = 48,453.88/x
  3. Step 3: Cross multiply
    86,172.36x = 118,929.20 × 48,453.88
  4. Step 4: Simplify right side
    86,172.36x = 5,762,581,185.30
  5. Step 5: Solve for x
    x = 5,762,581,185.30/86,172.36
  6. Step 6: Final answer
    x = 66,872.73

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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.