Home / 143,574.56-198,139.92-86,991.20

Finding the Fourth Proportional to 143,574.56, 198,139.92 and 86,991.20

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Solution

The fourth proportional to 143,574.56, 198,139.92 and 86,991.20 is: 120,052.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,574.56 : 198,139.92 = 86,991.20 : x
  2. Step 2: Convert to fraction form
    143,574.56/198,139.92 = 86,991.20/x
  3. Step 3: Cross multiply
    143,574.56x = 198,139.92 × 86,991.20
  4. Step 4: Simplify right side
    143,574.56x = 17,236,429,408.70
  5. Step 5: Solve for x
    x = 17,236,429,408.70/143,574.56
  6. Step 6: Final answer
    x = 120,052.11

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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.