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Finding the Fourth Proportional to 193,659.20, 290,431.20 and 75,262.40

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Solution

The fourth proportional to 193,659.20, 290,431.20 and 75,262.40 is: 112,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,659.20 : 290,431.20 = 75,262.40 : x
  2. Step 2: Convert to fraction form
    193,659.20/290,431.20 = 75,262.40/x
  3. Step 3: Cross multiply
    193,659.20x = 290,431.20 × 75,262.40
  4. Step 4: Simplify right side
    193,659.20x = 21,858,549,146.88
  5. Step 5: Solve for x
    x = 21,858,549,146.88/193,659.20
  6. Step 6: Final answer
    x = 112,871.21

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1.5x scale

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.