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Finding the Fourth Proportional to 131,030.60, 196,691.70 and 71,981.60

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Solution

The fourth proportional to 131,030.60, 196,691.70 and 71,981.60 is: 108,052.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,030.60 : 196,691.70 = 71,981.60 : x
  2. Step 2: Convert to fraction form
    131,030.60/196,691.70 = 71,981.60/x
  3. Step 3: Cross multiply
    131,030.60x = 196,691.70 × 71,981.60
  4. Step 4: Simplify right side
    131,030.60x = 14,158,183,272.72
  5. Step 5: Solve for x
    x = 14,158,183,272.72/131,030.60
  6. Step 6: Final answer
    x = 108,052.50

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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.