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Finding the Fourth Proportional to 70,892.55, 106,338.81 and 20,968.76

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Solution

The fourth proportional to 70,892.55, 106,338.81 and 20,968.76 is: 31,453.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,892.55 : 106,338.81 = 20,968.76 : x
  2. Step 2: Convert to fraction form
    70,892.55/106,338.81 = 20,968.76/x
  3. Step 3: Cross multiply
    70,892.55x = 106,338.81 × 20,968.76
  4. Step 4: Simplify right side
    70,892.55x = 2,229,792,453.88
  5. Step 5: Solve for x
    x = 2,229,792,453.88/70,892.55
  6. Step 6: Final answer
    x = 31,453.13

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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.