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Finding the Fourth Proportional to 70,832.35, 106,260.05 and 20,917.49

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Solution

The fourth proportional to 70,832.35, 106,260.05 and 20,917.49 is: 31,379.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,832.35 : 106,260.05 = 20,917.49 : x
  2. Step 2: Convert to fraction form
    70,832.35/106,260.05 = 20,917.49/x
  3. Step 3: Cross multiply
    70,832.35x = 106,260.05 × 20,917.49
  4. Step 4: Simplify right side
    70,832.35x = 2,222,693,428.69
  5. Step 5: Solve for x
    x = 2,222,693,428.69/70,832.35
  6. Step 6: Final answer
    x = 31,379.64

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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.