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Finding the Fourth Proportional to 131,861.64, 197,899.11 and 74,970.48

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Solution

The fourth proportional to 131,861.64, 197,899.11 and 74,970.48 is: 112,516.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,861.64 : 197,899.11 = 74,970.48 : x
  2. Step 2: Convert to fraction form
    131,861.64/197,899.11 = 74,970.48/x
  3. Step 3: Cross multiply
    131,861.64x = 197,899.11 × 74,970.48
  4. Step 4: Simplify right side
    131,861.64x = 14,836,591,268.27
  5. Step 5: Solve for x
    x = 14,836,591,268.27/131,861.64
  6. Step 6: Final answer
    x = 112,516.36

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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.