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Finding the Fourth Proportional to 115,489.80, 172,906.65 and 115,489.80

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Solution

The fourth proportional to 115,489.80, 172,906.65 and 115,489.80 is: 172,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,489.80 : 172,906.65 = 115,489.80 : x
  2. Step 2: Convert to fraction form
    115,489.80/172,906.65 = 115,489.80/x
  3. Step 3: Cross multiply
    115,489.80x = 172,906.65 × 115,489.80
  4. Step 4: Simplify right side
    115,489.80x = 19,968,954,427.17
  5. Step 5: Solve for x
    x = 19,968,954,427.17/115,489.80
  6. Step 6: Final answer
    x = 172,906.65

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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.