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Finding the Fourth Proportional to 68,880, 95,039.76 and 40,575.36

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Solution

The fourth proportional to 68,880, 95,039.76 and 40,575.36 is: 55,985.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,880 : 95,039.76 = 40,575.36 : x
  2. Step 2: Convert to fraction form
    68,880/95,039.76 = 40,575.36/x
  3. Step 3: Cross multiply
    68,880x = 95,039.76 × 40,575.36
  4. Step 4: Simplify right side
    68,880x = 3,856,272,476.31
  5. Step 5: Solve for x
    x = 3,856,272,476.31/68,880
  6. Step 6: Final answer
    x = 55,985.37

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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.