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Finding the Fourth Proportional to 124,997.80, 172,495.56 and 68,408.50

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Solution

The fourth proportional to 124,997.80, 172,495.56 and 68,408.50 is: 94,402.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,997.80 : 172,495.56 = 68,408.50 : x
  2. Step 2: Convert to fraction form
    124,997.80/172,495.56 = 68,408.50/x
  3. Step 3: Cross multiply
    124,997.80x = 172,495.56 × 68,408.50
  4. Step 4: Simplify right side
    124,997.80x = 11,800,162,516.26
  5. Step 5: Solve for x
    x = 11,800,162,516.26/124,997.80
  6. Step 6: Final answer
    x = 94,402.96

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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.