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Finding the Fourth Proportional to 124,969.50, 172,457.91 and 68,380.88

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Solution

The fourth proportional to 124,969.50, 172,457.91 and 68,380.88 is: 94,365.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,969.50 : 172,457.91 = 68,380.88 : x
  2. Step 2: Convert to fraction form
    124,969.50/172,457.91 = 68,380.88/x
  3. Step 3: Cross multiply
    124,969.50x = 172,457.91 × 68,380.88
  4. Step 4: Simplify right side
    124,969.50x = 11,792,822,786.47
  5. Step 5: Solve for x
    x = 11,792,822,786.47/124,969.50
  6. Step 6: Final answer
    x = 94,365.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.