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Finding the Fourth Proportional to 68,968.31, 103,452.80 and 20,937.34

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Solution

The fourth proportional to 68,968.31, 103,452.80 and 20,937.34 is: 31,406.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,968.31 : 103,452.80 = 20,937.34 : x
  2. Step 2: Convert to fraction form
    68,968.31/103,452.80 = 20,937.34/x
  3. Step 3: Cross multiply
    68,968.31x = 103,452.80 × 20,937.34
  4. Step 4: Simplify right side
    68,968.31x = 2,166,026,447.55
  5. Step 5: Solve for x
    x = 2,166,026,447.55/68,968.31
  6. Step 6: Final answer
    x = 31,406.11

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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.