Home / 143,855.48-198,521.04-78,443.84

Finding the Fourth Proportional to 143,855.48, 198,521.04 and 78,443.84

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Solution

The fourth proportional to 143,855.48, 198,521.04 and 78,443.84 is: 108,252.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,855.48 : 198,521.04 = 78,443.84 : x
  2. Step 2: Convert to fraction form
    143,855.48/198,521.04 = 78,443.84/x
  3. Step 3: Cross multiply
    143,855.48x = 198,521.04 × 78,443.84
  4. Step 4: Simplify right side
    143,855.48x = 15,572,752,698.39
  5. Step 5: Solve for x
    x = 15,572,752,698.39/143,855.48
  6. Step 6: Final answer
    x = 108,252.76

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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.