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Finding the Fourth Proportional to 124,989.60, 172,485 and 68,401.92

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Solution

The fourth proportional to 124,989.60, 172,485 and 68,401.92 is: 94,394.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,989.60 : 172,485 = 68,401.92 : x
  2. Step 2: Convert to fraction form
    124,989.60/172,485 = 68,401.92/x
  3. Step 3: Cross multiply
    124,989.60x = 172,485 × 68,401.92
  4. Step 4: Simplify right side
    124,989.60x = 11,798,305,171.20
  5. Step 5: Solve for x
    x = 11,798,305,171.20/124,989.60
  6. Step 6: Final answer
    x = 94,394.29

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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.