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Finding the Fourth Proportional to 143,954.18, 198,647.76 and 79,424.18

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Solution

The fourth proportional to 143,954.18, 198,647.76 and 79,424.18 is: 109,600.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,954.18 : 198,647.76 = 79,424.18 : x
  2. Step 2: Convert to fraction form
    143,954.18/198,647.76 = 79,424.18/x
  3. Step 3: Cross multiply
    143,954.18x = 198,647.76 × 79,424.18
  4. Step 4: Simplify right side
    143,954.18x = 15,777,435,446.84
  5. Step 5: Solve for x
    x = 15,777,435,446.84/143,954.18
  6. Step 6: Final answer
    x = 109,600.40

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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.