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Finding the Fourth Proportional to 68,636.88, 102,929.40 and 29,212.56

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Solution

The fourth proportional to 68,636.88, 102,929.40 and 29,212.56 is: 43,807.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,636.88 : 102,929.40 = 29,212.56 : x
  2. Step 2: Convert to fraction form
    68,636.88/102,929.40 = 29,212.56/x
  3. Step 3: Cross multiply
    68,636.88x = 102,929.40 × 29,212.56
  4. Step 4: Simplify right side
    68,636.88x = 3,006,831,273.26
  5. Step 5: Solve for x
    x = 3,006,831,273.26/68,636.88
  6. Step 6: Final answer
    x = 43,807.81

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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.