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Finding the Fourth Proportional to 70,287.48, 105,431.13 and 17,696.97

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Solution

The fourth proportional to 70,287.48, 105,431.13 and 17,696.97 is: 26,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,287.48 : 105,431.13 = 17,696.97 : x
  2. Step 2: Convert to fraction form
    70,287.48/105,431.13 = 17,696.97/x
  3. Step 3: Cross multiply
    70,287.48x = 105,431.13 × 17,696.97
  4. Step 4: Simplify right side
    70,287.48x = 1,865,811,544.68
  5. Step 5: Solve for x
    x = 1,865,811,544.68/70,287.48
  6. Step 6: Final answer
    x = 26,545.43

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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.