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Finding the Fourth Proportional to 70,839.67, 106,242.49 and 20,906.28

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Solution

The fourth proportional to 70,839.67, 106,242.49 and 20,906.28 is: 31,354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,839.67 : 106,242.49 = 20,906.28 : x
  2. Step 2: Convert to fraction form
    70,839.67/106,242.49 = 20,906.28/x
  3. Step 3: Cross multiply
    70,839.67x = 106,242.49 × 20,906.28
  4. Step 4: Simplify right side
    70,839.67x = 2,221,135,243.84
  5. Step 5: Solve for x
    x = 2,221,135,243.84/70,839.67
  6. Step 6: Final answer
    x = 31,354.40

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1.5x scale

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.