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Finding the Fourth Proportional to 115,540.80, 172,965.60 and 108,705.60

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Solution

The fourth proportional to 115,540.80, 172,965.60 and 108,705.60 is: 162,733.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,540.80 : 172,965.60 = 108,705.60 : x
  2. Step 2: Convert to fraction form
    115,540.80/172,965.60 = 108,705.60/x
  3. Step 3: Cross multiply
    115,540.80x = 172,965.60 × 108,705.60
  4. Step 4: Simplify right side
    115,540.80x = 18,802,329,327.36
  5. Step 5: Solve for x
    x = 18,802,329,327.36/115,540.80
  6. Step 6: Final answer
    x = 162,733.25

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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.