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Finding the Fourth Proportional to 143,100, 197,468.10 and 79,432.78

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Solution

The fourth proportional to 143,100, 197,468.10 and 79,432.78 is: 109,611.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,100 : 197,468.10 = 79,432.78 : x
  2. Step 2: Convert to fraction form
    143,100/197,468.10 = 79,432.78/x
  3. Step 3: Cross multiply
    143,100x = 197,468.10 × 79,432.78
  4. Step 4: Simplify right side
    143,100x = 15,685,440,144.32
  5. Step 5: Solve for x
    x = 15,685,440,144.32/143,100
  6. Step 6: Final answer
    x = 109,611.74

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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.