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Finding the Fourth Proportional to 123,396.80, 170,122.89 and 97,987.26

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Solution

The fourth proportional to 123,396.80, 170,122.89 and 97,987.26 is: 135,091.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,396.80 : 170,122.89 = 97,987.26 : x
  2. Step 2: Convert to fraction form
    123,396.80/170,122.89 = 97,987.26/x
  3. Step 3: Cross multiply
    123,396.80x = 170,122.89 × 97,987.26
  4. Step 4: Simplify right side
    123,396.80x = 16,669,876,859.79
  5. Step 5: Solve for x
    x = 16,669,876,859.79/123,396.80
  6. Step 6: Final answer
    x = 135,091.65

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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.