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Finding the Fourth Proportional to 68,963.94, 103,362.30 and 31,472.64

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Solution

The fourth proportional to 68,963.94, 103,362.30 and 31,472.64 is: 47,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,963.94 : 103,362.30 = 31,472.64 : x
  2. Step 2: Convert to fraction form
    68,963.94/103,362.30 = 31,472.64/x
  3. Step 3: Cross multiply
    68,963.94x = 103,362.30 × 31,472.64
  4. Step 4: Simplify right side
    68,963.94x = 3,253,084,457.47
  5. Step 5: Solve for x
    x = 3,253,084,457.47/68,963.94
  6. Step 6: Final answer
    x = 47,170.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.