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Finding the Fourth Proportional to 70,919.36, 106,388.76 and 31,475.60

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Solution

The fourth proportional to 70,919.36, 106,388.76 and 31,475.60 is: 47,217.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,919.36 : 106,388.76 = 31,475.60 : x
  2. Step 2: Convert to fraction form
    70,919.36/106,388.76 = 31,475.60/x
  3. Step 3: Cross multiply
    70,919.36x = 106,388.76 × 31,475.60
  4. Step 4: Simplify right side
    70,919.36x = 3,348,650,054.26
  5. Step 5: Solve for x
    x = 3,348,650,054.26/70,919.36
  6. Step 6: Final answer
    x = 47,217.71

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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.