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Finding the Fourth Proportional to 215,729.34, 323,739.81 and 75,489.18

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Solution

The fourth proportional to 215,729.34, 323,739.81 and 75,489.18 is: 113,284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,729.34 : 323,739.81 = 75,489.18 : x
  2. Step 2: Convert to fraction form
    215,729.34/323,739.81 = 75,489.18/x
  3. Step 3: Cross multiply
    215,729.34x = 323,739.81 × 75,489.18
  4. Step 4: Simplify right side
    215,729.34x = 24,438,852,790.26
  5. Step 5: Solve for x
    x = 24,438,852,790.26/215,729.34
  6. Step 6: Final answer
    x = 113,284.79

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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.