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Finding the Fourth Proportional to 143,197.98, 197,607.72 and 79,539.84

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Solution

The fourth proportional to 143,197.98, 197,607.72 and 79,539.84 is: 109,761.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,197.98 : 197,607.72 = 79,539.84 : x
  2. Step 2: Convert to fraction form
    143,197.98/197,607.72 = 79,539.84/x
  3. Step 3: Cross multiply
    143,197.98x = 197,607.72 × 79,539.84
  4. Step 4: Simplify right side
    143,197.98x = 15,717,686,431.56
  5. Step 5: Solve for x
    x = 15,717,686,431.56/143,197.98
  6. Step 6: Final answer
    x = 109,761.93

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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.