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Finding the Fourth Proportional to 254,169.72, 381,205.38 and 85,672.32

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Solution

The fourth proportional to 254,169.72, 381,205.38 and 85,672.32 is: 128,491.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,169.72 : 381,205.38 = 85,672.32 : x
  2. Step 2: Convert to fraction form
    254,169.72/381,205.38 = 85,672.32/x
  3. Step 3: Cross multiply
    254,169.72x = 381,205.38 × 85,672.32
  4. Step 4: Simplify right side
    254,169.72x = 32,658,749,301.08
  5. Step 5: Solve for x
    x = 32,658,749,301.08/254,169.72
  6. Step 6: Final answer
    x = 128,491.90

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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.