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Finding the Fourth Proportional to 112,784.22, 155,571.84 and 72,550.44

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Solution

The fourth proportional to 112,784.22, 155,571.84 and 72,550.44 is: 100,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,784.22 : 155,571.84 = 72,550.44 : x
  2. Step 2: Convert to fraction form
    112,784.22/155,571.84 = 72,550.44/x
  3. Step 3: Cross multiply
    112,784.22x = 155,571.84 × 72,550.44
  4. Step 4: Simplify right side
    112,784.22x = 11,286,805,443.61
  5. Step 5: Solve for x
    x = 11,286,805,443.61/112,784.22
  6. Step 6: Final answer
    x = 100,074.33

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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.