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Finding the Fourth Proportional to 136,213.75, 187,975.07 and 79,625.53

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Solution

The fourth proportional to 136,213.75, 187,975.07 and 79,625.53 is: 109,883.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,213.75 : 187,975.07 = 79,625.53 : x
  2. Step 2: Convert to fraction form
    136,213.75/187,975.07 = 79,625.53/x
  3. Step 3: Cross multiply
    136,213.75x = 187,975.07 × 79,625.53
  4. Step 4: Simplify right side
    136,213.75x = 14,967,614,575.54
  5. Step 5: Solve for x
    x = 14,967,614,575.54/136,213.75
  6. Step 6: Final answer
    x = 109,883.29

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1.5x scale

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.