Home / 315,351.86-472,617.07-128,144.50

Finding the Fourth Proportional to 315,351.86, 472,617.07 and 128,144.50

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Solution

The fourth proportional to 315,351.86, 472,617.07 and 128,144.50 is: 192,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,351.86 : 472,617.07 = 128,144.50 : x
  2. Step 2: Convert to fraction form
    315,351.86/472,617.07 = 128,144.50/x
  3. Step 3: Cross multiply
    315,351.86x = 472,617.07 × 128,144.50
  4. Step 4: Simplify right side
    315,351.86x = 60,563,278,126.62
  5. Step 5: Solve for x
    x = 60,563,278,126.62/315,351.86
  6. Step 6: Final answer
    x = 192,049.85

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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.