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Finding the Fourth Proportional to 67,911.66, 93,722.64 and 39,236.90

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Solution

The fourth proportional to 67,911.66, 93,722.64 and 39,236.90 is: 54,149.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,911.66 : 93,722.64 = 39,236.90 : x
  2. Step 2: Convert to fraction form
    67,911.66/93,722.64 = 39,236.90/x
  3. Step 3: Cross multiply
    67,911.66x = 93,722.64 × 39,236.90
  4. Step 4: Simplify right side
    67,911.66x = 3,677,385,384.80
  5. Step 5: Solve for x
    x = 3,677,385,384.80/67,911.66
  6. Step 6: Final answer
    x = 54,149.54

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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.