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Finding the Fourth Proportional to 112,993.78, 155,932.41 and 65,255.26

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Solution

The fourth proportional to 112,993.78, 155,932.41 and 65,255.26 is: 90,052.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,993.78 : 155,932.41 = 65,255.26 : x
  2. Step 2: Convert to fraction form
    112,993.78/155,932.41 = 65,255.26/x
  3. Step 3: Cross multiply
    112,993.78x = 155,932.41 × 65,255.26
  4. Step 4: Simplify right side
    112,993.78x = 10,175,409,956.98
  5. Step 5: Solve for x
    x = 10,175,409,956.98/112,993.78
  6. Step 6: Final answer
    x = 90,052.83

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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.