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Finding the Fourth Proportional to 115,606.54, 172,973.77 and 68,247.39

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Solution

The fourth proportional to 115,606.54, 172,973.77 and 68,247.39 is: 102,113.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,606.54 : 172,973.77 = 68,247.39 : x
  2. Step 2: Convert to fraction form
    115,606.54/172,973.77 = 68,247.39/x
  3. Step 3: Cross multiply
    115,606.54x = 172,973.77 × 68,247.39
  4. Step 4: Simplify right side
    115,606.54x = 11,805,009,010.94
  5. Step 5: Solve for x
    x = 11,805,009,010.94/115,606.54
  6. Step 6: Final answer
    x = 102,113.68

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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.