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Finding the Fourth Proportional to 100,809.55, 151,219.80 and 25,930.32

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Solution

The fourth proportional to 100,809.55, 151,219.80 and 25,930.32 is: 38,896.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,809.55 : 151,219.80 = 25,930.32 : x
  2. Step 2: Convert to fraction form
    100,809.55/151,219.80 = 25,930.32/x
  3. Step 3: Cross multiply
    100,809.55x = 151,219.80 × 25,930.32
  4. Step 4: Simplify right side
    100,809.55x = 3,921,177,237.26
  5. Step 5: Solve for x
    x = 3,921,177,237.26/100,809.55
  6. Step 6: Final answer
    x = 38,896.88

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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.