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Finding the Fourth Proportional to 143,958.62, 198,663.59 and 79,427.86

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Solution

The fourth proportional to 143,958.62, 198,663.59 and 79,427.86 is: 109,610.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,958.62 : 198,663.59 = 79,427.86 : x
  2. Step 2: Convert to fraction form
    143,958.62/198,663.59 = 79,427.86/x
  3. Step 3: Cross multiply
    143,958.62x = 198,663.59 × 79,427.86
  4. Step 4: Simplify right side
    143,958.62x = 15,779,423,813.62
  5. Step 5: Solve for x
    x = 15,779,423,813.62/143,958.62
  6. Step 6: Final answer
    x = 109,610.83

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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.