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Finding the Fourth Proportional to 142,992.60, 197,353.41 and 79,350.90

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Solution

The fourth proportional to 142,992.60, 197,353.41 and 79,350.90 is: 109,517.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,992.60 : 197,353.41 = 79,350.90 : x
  2. Step 2: Convert to fraction form
    142,992.60/197,353.41 = 79,350.90/x
  3. Step 3: Cross multiply
    142,992.60x = 197,353.41 × 79,350.90
  4. Step 4: Simplify right side
    142,992.60x = 15,660,170,701.57
  5. Step 5: Solve for x
    x = 15,660,170,701.57/142,992.60
  6. Step 6: Final answer
    x = 109,517.35

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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.