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Finding the Fourth Proportional to 70,693.11, 106,057.53 and 20,774.79

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Solution

The fourth proportional to 70,693.11, 106,057.53 and 20,774.79 is: 31,167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,693.11 : 106,057.53 = 20,774.79 : x
  2. Step 2: Convert to fraction form
    70,693.11/106,057.53 = 20,774.79/x
  3. Step 3: Cross multiply
    70,693.11x = 106,057.53 × 20,774.79
  4. Step 4: Simplify right side
    70,693.11x = 2,203,322,913.67
  5. Step 5: Solve for x
    x = 2,203,322,913.67/70,693.11
  6. Step 6: Final answer
    x = 31,167.44

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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.