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Finding the Fourth Proportional to 115,143.54, 172,742.63 and 36,257.54

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Solution

The fourth proportional to 115,143.54, 172,742.63 and 36,257.54 is: 54,394.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,143.54 : 172,742.63 = 36,257.54 : x
  2. Step 2: Convert to fraction form
    115,143.54/172,742.63 = 36,257.54/x
  3. Step 3: Cross multiply
    115,143.54x = 172,742.63 × 36,257.54
  4. Step 4: Simplify right side
    115,143.54x = 6,263,221,771.93
  5. Step 5: Solve for x
    x = 6,263,221,771.93/115,143.54
  6. Step 6: Final answer
    x = 54,394.90

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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.