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Finding the Fourth Proportional to 315,134.38, 472,629.58 and 90,493.03

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Solution

The fourth proportional to 315,134.38, 472,629.58 and 90,493.03 is: 135,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,134.38 : 472,629.58 = 90,493.03 : x
  2. Step 2: Convert to fraction form
    315,134.38/472,629.58 = 90,493.03/x
  3. Step 3: Cross multiply
    315,134.38x = 472,629.58 × 90,493.03
  4. Step 4: Simplify right side
    315,134.38x = 42,769,682,761.83
  5. Step 5: Solve for x
    x = 42,769,682,761.83/315,134.38
  6. Step 6: Final answer
    x = 135,718.87

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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.