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Finding the Fourth Proportional to 315,137.88, 472,634.82 and 90,496.54

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Solution

The fourth proportional to 315,137.88, 472,634.82 and 90,496.54 is: 135,724.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,137.88 : 472,634.82 = 90,496.54 : x
  2. Step 2: Convert to fraction form
    315,137.88/472,634.82 = 90,496.54/x
  3. Step 3: Cross multiply
    315,137.88x = 472,634.82 × 90,496.54
  4. Step 4: Simplify right side
    315,137.88x = 42,771,815,893.52
  5. Step 5: Solve for x
    x = 42,771,815,893.52/315,137.88
  6. Step 6: Final answer
    x = 135,724.13

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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.