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Finding the Fourth Proportional to 143,374.99, 197,868.57 and 86,016.46

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Solution

The fourth proportional to 143,374.99, 197,868.57 and 86,016.46 is: 118,709.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,374.99 : 197,868.57 = 86,016.46 : x
  2. Step 2: Convert to fraction form
    143,374.99/197,868.57 = 86,016.46/x
  3. Step 3: Cross multiply
    143,374.99x = 197,868.57 × 86,016.46
  4. Step 4: Simplify right side
    143,374.99x = 17,019,952,517.24
  5. Step 5: Solve for x
    x = 17,019,952,517.24/143,374.99
  6. Step 6: Final answer
    x = 118,709.36

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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.