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Finding the Fourth Proportional to 115,257.40, 172,910.40 and 36,379.60

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Solution

The fourth proportional to 115,257.40, 172,910.40 and 36,379.60 is: 54,577.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,257.40 : 172,910.40 = 36,379.60 : x
  2. Step 2: Convert to fraction form
    115,257.40/172,910.40 = 36,379.60/x
  3. Step 3: Cross multiply
    115,257.40x = 172,910.40 × 36,379.60
  4. Step 4: Simplify right side
    115,257.40x = 6,290,411,187.84
  5. Step 5: Solve for x
    x = 6,290,411,187.84/115,257.40
  6. Step 6: Final answer
    x = 54,577.07

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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.