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Finding the Fourth Proportional to 123,157.26, 169,958.91 and 72,157.79

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Solution

The fourth proportional to 123,157.26, 169,958.91 and 72,157.79 is: 99,578.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,157.26 : 169,958.91 = 72,157.79 : x
  2. Step 2: Convert to fraction form
    123,157.26/169,958.91 = 72,157.79/x
  3. Step 3: Cross multiply
    123,157.26x = 169,958.91 × 72,157.79
  4. Step 4: Simplify right side
    123,157.26x = 12,263,858,486.61
  5. Step 5: Solve for x
    x = 12,263,858,486.61/123,157.26
  6. Step 6: Final answer
    x = 99,578.85

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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.