Home / 78,939.26-118,427.37-53,991.06

Finding the Fourth Proportional to 78,939.26, 118,427.37 and 53,991.06

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Solution

The fourth proportional to 78,939.26, 118,427.37 and 53,991.06 is: 80,999.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.26 : 118,427.37 = 53,991.06 : x
  2. Step 2: Convert to fraction form
    78,939.26/118,427.37 = 53,991.06/x
  3. Step 3: Cross multiply
    78,939.26x = 118,427.37 × 53,991.06
  4. Step 4: Simplify right side
    78,939.26x = 6,394,018,592.74
  5. Step 5: Solve for x
    x = 6,394,018,592.74/78,939.26
  6. Step 6: Final answer
    x = 80,999.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.