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Finding the Fourth Proportional to 131,540.70, 197,019.45 and 79,052.70

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Solution

The fourth proportional to 131,540.70, 197,019.45 and 79,052.70 is: 118,403.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,540.70 : 197,019.45 = 79,052.70 : x
  2. Step 2: Convert to fraction form
    131,540.70/197,019.45 = 79,052.70/x
  3. Step 3: Cross multiply
    131,540.70x = 197,019.45 × 79,052.70
  4. Step 4: Simplify right side
    131,540.70x = 15,574,919,475.02
  5. Step 5: Solve for x
    x = 15,574,919,475.02/131,540.70
  6. Step 6: Final answer
    x = 118,403.81

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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.