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Finding the Fourth Proportional to 173,129.28, 259,841.28 and 68,021.76

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Solution

The fourth proportional to 173,129.28, 259,841.28 and 68,021.76 is: 102,090.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,129.28 : 259,841.28 = 68,021.76 : x
  2. Step 2: Convert to fraction form
    173,129.28/259,841.28 = 68,021.76/x
  3. Step 3: Cross multiply
    173,129.28x = 259,841.28 × 68,021.76
  4. Step 4: Simplify right side
    173,129.28x = 17,674,861,186.25
  5. Step 5: Solve for x
    x = 17,674,861,186.25/173,129.28
  6. Step 6: Final answer
    x = 102,090.54

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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.