Home / 315,072.20-472,678.80-115,388.60

Finding the Fourth Proportional to 315,072.20, 472,678.80 and 115,388.60

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Solution

The fourth proportional to 315,072.20, 472,678.80 and 115,388.60 is: 173,108.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,072.20 : 472,678.80 = 115,388.60 : x
  2. Step 2: Convert to fraction form
    315,072.20/472,678.80 = 115,388.60/x
  3. Step 3: Cross multiply
    315,072.20x = 472,678.80 × 115,388.60
  4. Step 4: Simplify right side
    315,072.20x = 54,541,744,981.68
  5. Step 5: Solve for x
    x = 54,541,744,981.68/315,072.20
  6. Step 6: Final answer
    x = 173,108.72

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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.