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Finding the Fourth Proportional to 315,138.38, 472,635.57 and 90,497.04

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Solution

The fourth proportional to 315,138.38, 472,635.57 and 90,497.04 is: 135,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,138.38 : 472,635.57 = 90,497.04 : x
  2. Step 2: Convert to fraction form
    315,138.38/472,635.57 = 90,497.04/x
  3. Step 3: Cross multiply
    315,138.38x = 472,635.57 × 90,497.04
  4. Step 4: Simplify right side
    315,138.38x = 42,772,120,083.71
  5. Step 5: Solve for x
    x = 42,772,120,083.71/315,138.38
  6. Step 6: Final answer
    x = 135,724.88

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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.