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Finding the Fourth Proportional to 149,602.55, 206,447.03 and 81,620.87

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Solution

The fourth proportional to 149,602.55, 206,447.03 and 81,620.87 is: 112,634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,602.55 : 206,447.03 = 81,620.87 : x
  2. Step 2: Convert to fraction form
    149,602.55/206,447.03 = 81,620.87/x
  3. Step 3: Cross multiply
    149,602.55x = 206,447.03 × 81,620.87
  4. Step 4: Simplify right side
    149,602.55x = 16,850,385,063.25
  5. Step 5: Solve for x
    x = 16,850,385,063.25/149,602.55
  6. Step 6: Final answer
    x = 112,634.35

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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.