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Finding the Fourth Proportional to 143,486.99, 198,011.89 and 79,823.42

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Solution

The fourth proportional to 143,486.99, 198,011.89 and 79,823.42 is: 110,156.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,486.99 : 198,011.89 = 79,823.42 : x
  2. Step 2: Convert to fraction form
    143,486.99/198,011.89 = 79,823.42/x
  3. Step 3: Cross multiply
    143,486.99x = 198,011.89 × 79,823.42
  4. Step 4: Simplify right side
    143,486.99x = 15,805,986,260.46
  5. Step 5: Solve for x
    x = 15,805,986,260.46/143,486.99
  6. Step 6: Final answer
    x = 110,156.23

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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.