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Finding the Fourth Proportional to 124,940.80, 172,410.96 and 68,348.80

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Solution

The fourth proportional to 124,940.80, 172,410.96 and 68,348.80 is: 94,317.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,940.80 : 172,410.96 = 68,348.80 : x
  2. Step 2: Convert to fraction form
    124,940.80/172,410.96 = 68,348.80/x
  3. Step 3: Cross multiply
    124,940.80x = 172,410.96 × 68,348.80
  4. Step 4: Simplify right side
    124,940.80x = 11,784,082,222.85
  5. Step 5: Solve for x
    x = 11,784,082,222.85/124,940.80
  6. Step 6: Final answer
    x = 94,317.33

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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.