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Finding the Fourth Proportional to 86,540.96, 118,399.12 and 86,167.16

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Solution

The fourth proportional to 86,540.96, 118,399.12 and 86,167.16 is: 117,887.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,540.96 : 118,399.12 = 86,167.16 : x
  2. Step 2: Convert to fraction form
    86,540.96/118,399.12 = 86,167.16/x
  3. Step 3: Cross multiply
    86,540.96x = 118,399.12 × 86,167.16
  4. Step 4: Simplify right side
    86,540.96x = 10,202,115,916.90
  5. Step 5: Solve for x
    x = 10,202,115,916.90/86,540.96
  6. Step 6: Final answer
    x = 117,887.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.