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Finding the Fourth Proportional to 143,473.92, 197,987.32 and 79,816

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Solution

The fourth proportional to 143,473.92, 197,987.32 and 79,816 is: 110,142.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,473.92 : 197,987.32 = 79,816 : x
  2. Step 2: Convert to fraction form
    143,473.92/197,987.32 = 79,816/x
  3. Step 3: Cross multiply
    143,473.92x = 197,987.32 × 79,816
  4. Step 4: Simplify right side
    143,473.92x = 15,802,555,933.12
  5. Step 5: Solve for x
    x = 15,802,555,933.12/143,473.92
  6. Step 6: Final answer
    x = 110,142.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.