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Finding the Fourth Proportional to 123,165.20, 169,879.80 and 80,064.29

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Solution

The fourth proportional to 123,165.20, 169,879.80 and 80,064.29 is: 110,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,165.20 : 169,879.80 = 80,064.29 : x
  2. Step 2: Convert to fraction form
    123,165.20/169,879.80 = 80,064.29/x
  3. Step 3: Cross multiply
    123,165.20x = 169,879.80 × 80,064.29
  4. Step 4: Simplify right side
    123,165.20x = 13,601,305,997.04
  5. Step 5: Solve for x
    x = 13,601,305,997.04/123,165.20
  6. Step 6: Final answer
    x = 110,431.40

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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.