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Finding the Fourth Proportional to 144,188.81, 198,979.89 and 79,658.07

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Solution

The fourth proportional to 144,188.81, 198,979.89 and 79,658.07 is: 109,927.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,188.81 : 198,979.89 = 79,658.07 : x
  2. Step 2: Convert to fraction form
    144,188.81/198,979.89 = 79,658.07/x
  3. Step 3: Cross multiply
    144,188.81x = 198,979.89 × 79,658.07
  4. Step 4: Simplify right side
    144,188.81x = 15,850,354,006.21
  5. Step 5: Solve for x
    x = 15,850,354,006.21/144,188.81
  6. Step 6: Final answer
    x = 109,927.77

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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.