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Finding the Fourth Proportional to 68,656.44, 102,994.40 and 21,275.25

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Solution

The fourth proportional to 68,656.44, 102,994.40 and 21,275.25 is: 31,915.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,656.44 : 102,994.40 = 21,275.25 : x
  2. Step 2: Convert to fraction form
    68,656.44/102,994.40 = 21,275.25/x
  3. Step 3: Cross multiply
    68,656.44x = 102,994.40 × 21,275.25
  4. Step 4: Simplify right side
    68,656.44x = 2,191,231,608.60
  5. Step 5: Solve for x
    x = 2,191,231,608.60/68,656.44
  6. Step 6: Final answer
    x = 31,915.89

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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.