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Finding the Fourth Proportional to 143,355.58, 197,837.74 and 79,692

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Solution

The fourth proportional to 143,355.58, 197,837.74 and 79,692 is: 109,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,355.58 : 197,837.74 = 79,692 : x
  2. Step 2: Convert to fraction form
    143,355.58/197,837.74 = 79,692/x
  3. Step 3: Cross multiply
    143,355.58x = 197,837.74 × 79,692
  4. Step 4: Simplify right side
    143,355.58x = 15,766,085,176.08
  5. Step 5: Solve for x
    x = 15,766,085,176.08/143,355.58
  6. Step 6: Final answer
    x = 109,978.87

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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.