Home / 143,942.40-198,639.86-79,409.88

Finding the Fourth Proportional to 143,942.40, 198,639.86 and 79,409.88

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Solution

The fourth proportional to 143,942.40, 198,639.86 and 79,409.88 is: 109,585.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,942.40 : 198,639.86 = 79,409.88 : x
  2. Step 2: Convert to fraction form
    143,942.40/198,639.86 = 79,409.88/x
  3. Step 3: Cross multiply
    143,942.40x = 198,639.86 × 79,409.88
  4. Step 4: Simplify right side
    143,942.40x = 15,773,967,048.77
  5. Step 5: Solve for x
    x = 15,773,967,048.77/143,942.40
  6. Step 6: Final answer
    x = 109,585.27

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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.