Home / 315,355.05-472,981.41-90,664.29

Finding the Fourth Proportional to 315,355.05, 472,981.41 and 90,664.29

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Solution

The fourth proportional to 315,355.05, 472,981.41 and 90,664.29 is: 135,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,355.05 : 472,981.41 = 90,664.29 : x
  2. Step 2: Convert to fraction form
    315,355.05/472,981.41 = 90,664.29/x
  3. Step 3: Cross multiply
    315,355.05x = 472,981.41 × 90,664.29
  4. Step 4: Simplify right side
    315,355.05x = 42,882,523,720.85
  5. Step 5: Solve for x
    x = 42,882,523,720.85/315,355.05
  6. Step 6: Final answer
    x = 135,981.73

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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.