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Finding the Fourth Proportional to 149,011.64, 205,636.05 and 81,943.64

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Solution

The fourth proportional to 149,011.64, 205,636.05 and 81,943.64 is: 113,082.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,011.64 : 205,636.05 = 81,943.64 : x
  2. Step 2: Convert to fraction form
    149,011.64/205,636.05 = 81,943.64/x
  3. Step 3: Cross multiply
    149,011.64x = 205,636.05 × 81,943.64
  4. Step 4: Simplify right side
    149,011.64x = 16,850,566,452.22
  5. Step 5: Solve for x
    x = 16,850,566,452.22/149,011.64
  6. Step 6: Final answer
    x = 113,082.22

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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.