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Finding the Fourth Proportional to 70,317.21, 105,489.90 and 25,944.15

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Solution

The fourth proportional to 70,317.21, 105,489.90 and 25,944.15 is: 38,921.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,317.21 : 105,489.90 = 25,944.15 : x
  2. Step 2: Convert to fraction form
    70,317.21/105,489.90 = 25,944.15/x
  3. Step 3: Cross multiply
    70,317.21x = 105,489.90 × 25,944.15
  4. Step 4: Simplify right side
    70,317.21x = 2,736,845,789.09
  5. Step 5: Solve for x
    x = 2,736,845,789.09/70,317.21
  6. Step 6: Final answer
    x = 38,921.42

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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.