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Finding the Fourth Proportional to 260,134.28, 390,201.58 and 73,145.78

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Solution

The fourth proportional to 260,134.28, 390,201.58 and 73,145.78 is: 109,718.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,134.28 : 390,201.58 = 73,145.78 : x
  2. Step 2: Convert to fraction form
    260,134.28/390,201.58 = 73,145.78/x
  3. Step 3: Cross multiply
    260,134.28x = 390,201.58 × 73,145.78
  4. Step 4: Simplify right side
    260,134.28x = 28,541,598,926.33
  5. Step 5: Solve for x
    x = 28,541,598,926.33/260,134.28
  6. Step 6: Final answer
    x = 109,718.71

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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.