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Finding the Fourth Proportional to 143,462.80, 198,016.68 and 101,040.40

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Solution

The fourth proportional to 143,462.80, 198,016.68 and 101,040.40 is: 139,462.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,462.80 : 198,016.68 = 101,040.40 : x
  2. Step 2: Convert to fraction form
    143,462.80/198,016.68 = 101,040.40/x
  3. Step 3: Cross multiply
    143,462.80x = 198,016.68 × 101,040.40
  4. Step 4: Simplify right side
    143,462.80x = 20,007,684,553.87
  5. Step 5: Solve for x
    x = 20,007,684,553.87/143,462.80
  6. Step 6: Final answer
    x = 139,462.53

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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.