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Finding the Fourth Proportional to 143,375.36, 197,869.08 and 86,016.83

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Solution

The fourth proportional to 143,375.36, 197,869.08 and 86,016.83 is: 118,709.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,375.36 : 197,869.08 = 86,016.83 : x
  2. Step 2: Convert to fraction form
    143,375.36/197,869.08 = 86,016.83/x
  3. Step 3: Cross multiply
    143,375.36x = 197,869.08 × 86,016.83
  4. Step 4: Simplify right side
    143,375.36x = 17,020,071,016.62
  5. Step 5: Solve for x
    x = 17,020,071,016.62/143,375.36
  6. Step 6: Final answer
    x = 118,709.87

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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.