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Finding the Fourth Proportional to 86,216.52, 118,978.02 and 48,489.96

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Solution

The fourth proportional to 86,216.52, 118,978.02 and 48,489.96 is: 66,915.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,216.52 : 118,978.02 = 48,489.96 : x
  2. Step 2: Convert to fraction form
    86,216.52/118,978.02 = 48,489.96/x
  3. Step 3: Cross multiply
    86,216.52x = 118,978.02 × 48,489.96
  4. Step 4: Simplify right side
    86,216.52x = 5,769,239,430.68
  5. Step 5: Solve for x
    x = 5,769,239,430.68/86,216.52
  6. Step 6: Final answer
    x = 66,915.71

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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.