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Finding the Fourth Proportional to 68,693.78, 103,570.42 and 68,267.31

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Solution

The fourth proportional to 68,693.78, 103,570.42 and 68,267.31 is: 102,927.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,693.78 : 103,570.42 = 68,267.31 : x
  2. Step 2: Convert to fraction form
    68,693.78/103,570.42 = 68,267.31/x
  3. Step 3: Cross multiply
    68,693.78x = 103,570.42 × 68,267.31
  4. Step 4: Simplify right side
    68,693.78x = 7,070,473,886.56
  5. Step 5: Solve for x
    x = 7,070,473,886.56/68,693.78
  6. Step 6: Final answer
    x = 102,927.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.