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Finding the Fourth Proportional to 203,920.40, 305,880.60 and 140,934.80

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Solution

The fourth proportional to 203,920.40, 305,880.60 and 140,934.80 is: 211,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,920.40 : 305,880.60 = 140,934.80 : x
  2. Step 2: Convert to fraction form
    203,920.40/305,880.60 = 140,934.80/x
  3. Step 3: Cross multiply
    203,920.40x = 305,880.60 × 140,934.80
  4. Step 4: Simplify right side
    203,920.40x = 43,109,221,184.88
  5. Step 5: Solve for x
    x = 43,109,221,184.88/203,920.40
  6. Step 6: Final answer
    x = 211,402.20

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1.5x scale

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.