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Finding the Fourth Proportional to 158,879.13, 219,272.66 and 91,811.13

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Solution

The fourth proportional to 158,879.13, 219,272.66 and 91,811.13 is: 126,710.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,879.13 : 219,272.66 = 91,811.13 : x
  2. Step 2: Convert to fraction form
    158,879.13/219,272.66 = 91,811.13/x
  3. Step 3: Cross multiply
    158,879.13x = 219,272.66 × 91,811.13
  4. Step 4: Simplify right side
    158,879.13x = 20,131,670,692.71
  5. Step 5: Solve for x
    x = 20,131,670,692.71/158,879.13
  6. Step 6: Final answer
    x = 126,710.61

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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.