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Finding the Fourth Proportional to 67,129.28, 92,640.78 and 36,916.89

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Solution

The fourth proportional to 67,129.28, 92,640.78 and 36,916.89 is: 50,946.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,129.28 : 92,640.78 = 36,916.89 : x
  2. Step 2: Convert to fraction form
    67,129.28/92,640.78 = 36,916.89/x
  3. Step 3: Cross multiply
    67,129.28x = 92,640.78 × 36,916.89
  4. Step 4: Simplify right side
    67,129.28x = 3,420,009,137.37
  5. Step 5: Solve for x
    x = 3,420,009,137.37/67,129.28
  6. Step 6: Final answer
    x = 50,946.61

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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.