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Finding the Fourth Proportional to 123,620.84, 170,589.62 and 72,625.64

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Solution

The fourth proportional to 123,620.84, 170,589.62 and 72,625.64 is: 100,219.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,620.84 : 170,589.62 = 72,625.64 : x
  2. Step 2: Convert to fraction form
    123,620.84/170,589.62 = 72,625.64/x
  3. Step 3: Cross multiply
    123,620.84x = 170,589.62 × 72,625.64
  4. Step 4: Simplify right side
    123,620.84x = 12,389,180,329.86
  5. Step 5: Solve for x
    x = 12,389,180,329.86/123,620.84
  6. Step 6: Final answer
    x = 100,219.19

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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.