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Finding the Fourth Proportional to 141,571.88, 195,369.09 and 77,909.68

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Solution

The fourth proportional to 141,571.88, 195,369.09 and 77,909.68 is: 107,515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,571.88 : 195,369.09 = 77,909.68 : x
  2. Step 2: Convert to fraction form
    141,571.88/195,369.09 = 77,909.68/x
  3. Step 3: Cross multiply
    141,571.88x = 195,369.09 × 77,909.68
  4. Step 4: Simplify right side
    141,571.88x = 15,221,143,382.67
  5. Step 5: Solve for x
    x = 15,221,143,382.67/141,571.88
  6. Step 6: Final answer
    x = 107,515.30

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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.