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Finding the Fourth Proportional to 158,521.50, 218,759.67 and 91,453.50

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Solution

The fourth proportional to 158,521.50, 218,759.67 and 91,453.50 is: 126,205.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,521.50 : 218,759.67 = 91,453.50 : x
  2. Step 2: Convert to fraction form
    158,521.50/218,759.67 = 91,453.50/x
  3. Step 3: Cross multiply
    158,521.50x = 218,759.67 × 91,453.50
  4. Step 4: Simplify right side
    158,521.50x = 20,006,337,480.35
  5. Step 5: Solve for x
    x = 20,006,337,480.35/158,521.50
  6. Step 6: Final answer
    x = 126,205.83

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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.