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Finding the Fourth Proportional to 143,995, 198,712.56 and 80,329

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Solution

The fourth proportional to 143,995, 198,712.56 and 80,329 is: 110,853.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,995 : 198,712.56 = 80,329 : x
  2. Step 2: Convert to fraction form
    143,995/198,712.56 = 80,329/x
  3. Step 3: Cross multiply
    143,995x = 198,712.56 × 80,329
  4. Step 4: Simplify right side
    143,995x = 15,962,381,232.24
  5. Step 5: Solve for x
    x = 15,962,381,232.24/143,995
  6. Step 6: Final answer
    x = 110,853.72

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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.