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Finding the Fourth Proportional to 70,287.12, 105,471.96 and 25,917.33

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Solution

The fourth proportional to 70,287.12, 105,471.96 and 25,917.33 is: 38,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,287.12 : 105,471.96 = 25,917.33 : x
  2. Step 2: Convert to fraction form
    70,287.12/105,471.96 = 25,917.33/x
  3. Step 3: Cross multiply
    70,287.12x = 105,471.96 × 25,917.33
  4. Step 4: Simplify right side
    70,287.12x = 2,733,551,593.07
  5. Step 5: Solve for x
    x = 2,733,551,593.07/70,287.12
  6. Step 6: Final answer
    x = 38,891.22

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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.