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Finding the Fourth Proportional to 143,838.62, 198,490.08 and 80,164.12

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Solution

The fourth proportional to 143,838.62, 198,490.08 and 80,164.12 is: 110,622.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,838.62 : 198,490.08 = 80,164.12 : x
  2. Step 2: Convert to fraction form
    143,838.62/198,490.08 = 80,164.12/x
  3. Step 3: Cross multiply
    143,838.62x = 198,490.08 × 80,164.12
  4. Step 4: Simplify right side
    143,838.62x = 15,911,782,591.93
  5. Step 5: Solve for x
    x = 15,911,782,591.93/143,838.62
  6. Step 6: Final answer
    x = 110,622.46

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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.