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Finding the Fourth Proportional to 143,920.80, 215,881.20 and 50,414.40

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Solution

The fourth proportional to 143,920.80, 215,881.20 and 50,414.40 is: 75,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,920.80 : 215,881.20 = 50,414.40 : x
  2. Step 2: Convert to fraction form
    143,920.80/215,881.20 = 50,414.40/x
  3. Step 3: Cross multiply
    143,920.80x = 215,881.20 × 50,414.40
  4. Step 4: Simplify right side
    143,920.80x = 10,883,521,169.28
  5. Step 5: Solve for x
    x = 10,883,521,169.28/143,920.80
  6. Step 6: Final answer
    x = 75,621.60

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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.