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Finding the Fourth Proportional to 89,999.86, 123,120.46 and 89,620.78

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Solution

The fourth proportional to 89,999.86, 123,120.46 and 89,620.78 is: 122,601.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,999.86 : 123,120.46 = 89,620.78 : x
  2. Step 2: Convert to fraction form
    89,999.86/123,120.46 = 89,620.78/x
  3. Step 3: Cross multiply
    89,999.86x = 123,120.46 × 89,620.78
  4. Step 4: Simplify right side
    89,999.86x = 11,034,151,659.16
  5. Step 5: Solve for x
    x = 11,034,151,659.16/89,999.86
  6. Step 6: Final answer
    x = 122,601.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.