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Finding the Fourth Proportional to 217,958.80, 300,792 and 122,465.20

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Solution

The fourth proportional to 217,958.80, 300,792 and 122,465.20 is: 169,006.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,958.80 : 300,792 = 122,465.20 : x
  2. Step 2: Convert to fraction form
    217,958.80/300,792 = 122,465.20/x
  3. Step 3: Cross multiply
    217,958.80x = 300,792 × 122,465.20
  4. Step 4: Simplify right side
    217,958.80x = 36,836,552,438.40
  5. Step 5: Solve for x
    x = 36,836,552,438.40/217,958.80
  6. Step 6: Final answer
    x = 169,006.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.