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Finding the Fourth Proportional to 254,129.05, 381,228.81 and 85,697.65

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Solution

The fourth proportional to 254,129.05, 381,228.81 and 85,697.65 is: 128,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,129.05 : 381,228.81 = 85,697.65 : x
  2. Step 2: Convert to fraction form
    254,129.05/381,228.81 = 85,697.65/x
  3. Step 3: Cross multiply
    254,129.05x = 381,228.81 × 85,697.65
  4. Step 4: Simplify right side
    254,129.05x = 32,670,413,129.30
  5. Step 5: Solve for x
    x = 32,670,413,129.30/254,129.05
  6. Step 6: Final answer
    x = 128,558.36

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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.