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Finding the Fourth Proportional to 259,294.70, 388,999.18 and 79,381.49

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Solution

The fourth proportional to 259,294.70, 388,999.18 and 79,381.49 is: 119,089.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,294.70 : 388,999.18 = 79,381.49 : x
  2. Step 2: Convert to fraction form
    259,294.70/388,999.18 = 79,381.49/x
  3. Step 3: Cross multiply
    259,294.70x = 388,999.18 × 79,381.49
  4. Step 4: Simplify right side
    259,294.70x = 30,879,332,671.41
  5. Step 5: Solve for x
    x = 30,879,332,671.41/259,294.70
  6. Step 6: Final answer
    x = 119,089.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.