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Finding the Fourth Proportional to 131,861.70, 197,811.40 and 40,684.82

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Solution

The fourth proportional to 131,861.70, 197,811.40 and 40,684.82 is: 61,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,861.70 : 197,811.40 = 40,684.82 : x
  2. Step 2: Convert to fraction form
    131,861.70/197,811.40 = 40,684.82/x
  3. Step 3: Cross multiply
    131,861.70x = 197,811.40 × 40,684.82
  4. Step 4: Simplify right side
    131,861.70x = 8,047,921,595.76
  5. Step 5: Solve for x
    x = 8,047,921,595.76/131,861.70
  6. Step 6: Final answer
    x = 61,033.05

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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.