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Finding the Fourth Proportional to 149,581, 206,425.65 and 81,599.10

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Solution

The fourth proportional to 149,581, 206,425.65 and 81,599.10 is: 112,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,581 : 206,425.65 = 81,599.10 : x
  2. Step 2: Convert to fraction form
    149,581/206,425.65 = 81,599.10/x
  3. Step 3: Cross multiply
    149,581x = 206,425.65 × 81,599.10
  4. Step 4: Simplify right side
    149,581x = 16,844,147,256.92
  5. Step 5: Solve for x
    x = 16,844,147,256.92/149,581
  6. Step 6: Final answer
    x = 112,608.87

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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.