Home / 143,985.21-198,735.17-87,443.97

Finding the Fourth Proportional to 143,985.21, 198,735.17 and 87,443.97

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Solution

The fourth proportional to 143,985.21, 198,735.17 and 87,443.97 is: 120,694.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,985.21 : 198,735.17 = 87,443.97 : x
  2. Step 2: Convert to fraction form
    143,985.21/198,735.17 = 87,443.97/x
  3. Step 3: Cross multiply
    143,985.21x = 198,735.17 × 87,443.97
  4. Step 4: Simplify right side
    143,985.21x = 17,378,191,806.21
  5. Step 5: Solve for x
    x = 17,378,191,806.21/143,985.21
  6. Step 6: Final answer
    x = 120,694.28

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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.