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Finding the Fourth Proportional to 86,217.11, 118,978.47 and 48,491.36

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Solution

The fourth proportional to 86,217.11, 118,978.47 and 48,491.36 is: 66,917.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,217.11 : 118,978.47 = 48,491.36 : x
  2. Step 2: Convert to fraction form
    86,217.11/118,978.47 = 48,491.36/x
  3. Step 3: Cross multiply
    86,217.11x = 118,978.47 × 48,491.36
  4. Step 4: Simplify right side
    86,217.11x = 5,769,427,821.02
  5. Step 5: Solve for x
    x = 5,769,427,821.02/86,217.11
  6. Step 6: Final answer
    x = 66,917.43

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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.