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Finding the Fourth Proportional to 143,523.12, 198,060.48 and 79,859.82

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Solution

The fourth proportional to 143,523.12, 198,060.48 and 79,859.82 is: 110,205.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,523.12 : 198,060.48 = 79,859.82 : x
  2. Step 2: Convert to fraction form
    143,523.12/198,060.48 = 79,859.82/x
  3. Step 3: Cross multiply
    143,523.12x = 198,060.48 × 79,859.82
  4. Step 4: Simplify right side
    143,523.12x = 15,817,074,281.91
  5. Step 5: Solve for x
    x = 15,817,074,281.91/143,523.12
  6. Step 6: Final answer
    x = 110,205.76

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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.