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Finding the Fourth Proportional to 68,656.16, 102,988.92 and 21,912.56

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Solution

The fourth proportional to 68,656.16, 102,988.92 and 21,912.56 is: 32,870.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,656.16 : 102,988.92 = 21,912.56 : x
  2. Step 2: Convert to fraction form
    68,656.16/102,988.92 = 21,912.56/x
  3. Step 3: Cross multiply
    68,656.16x = 102,988.92 × 21,912.56
  4. Step 4: Simplify right side
    68,656.16x = 2,256,750,888.84
  5. Step 5: Solve for x
    x = 2,256,750,888.84/68,656.16
  6. Step 6: Final answer
    x = 32,870.33

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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.