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Finding the Fourth Proportional to 70,850.79, 106,287.72 and 20,935.92

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Solution

The fourth proportional to 70,850.79, 106,287.72 and 20,935.92 is: 31,407.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,850.79 : 106,287.72 = 20,935.92 : x
  2. Step 2: Convert to fraction form
    70,850.79/106,287.72 = 20,935.92/x
  3. Step 3: Cross multiply
    70,850.79x = 106,287.72 × 20,935.92
  4. Step 4: Simplify right side
    70,850.79x = 2,225,231,202.90
  5. Step 5: Solve for x
    x = 2,225,231,202.90/70,850.79
  6. Step 6: Final answer
    x = 31,407.29

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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.