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Finding the Fourth Proportional to 143,485.99, 198,010.51 and 79,822.42

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Solution

The fourth proportional to 143,485.99, 198,010.51 and 79,822.42 is: 110,154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,485.99 : 198,010.51 = 79,822.42 : x
  2. Step 2: Convert to fraction form
    143,485.99/198,010.51 = 79,822.42/x
  3. Step 3: Cross multiply
    143,485.99x = 198,010.51 × 79,822.42
  4. Step 4: Simplify right side
    143,485.99x = 15,805,678,093.63
  5. Step 5: Solve for x
    x = 15,805,678,093.63/143,485.99
  6. Step 6: Final answer
    x = 110,154.85

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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.