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Finding the Fourth Proportional to 101,231.32, 151,847.52 and 66,391.60

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Solution

The fourth proportional to 101,231.32, 151,847.52 and 66,391.60 is: 99,587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,231.32 : 151,847.52 = 66,391.60 : x
  2. Step 2: Convert to fraction form
    101,231.32/151,847.52 = 66,391.60/x
  3. Step 3: Cross multiply
    101,231.32x = 151,847.52 × 66,391.60
  4. Step 4: Simplify right side
    101,231.32x = 10,081,399,808.83
  5. Step 5: Solve for x
    x = 10,081,399,808.83/101,231.32
  6. Step 6: Final answer
    x = 99,587.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.